The Collaborative International Dictionary of English v.0.48:

Unity \U"ni*ty\, n.; pl. Unities. [OE. unite, F. unit['e], L.
   unitas, from unus one. See One, and cf. Unit.]
   1. The state of being one; oneness.
      [1913 Webster]

            Whatever we can consider as one thing suggests to
            the understanding the idea of unity.  --Locks.
      [1913 Webster]

   Note: Unity is affirmed of a simple substance or indivisible
         monad, or of several particles or parts so intimately
         and closely united as to constitute a separate body or
         thing. See the Synonyms under Union.
         [1913 Webster]

   2. Concord; harmony; conjunction; agreement; uniformity; as,
      a unity of proofs; unity of doctrine.
      [1913 Webster]

            Behold, how good and how pleasant it is for brethren
            to dwell together in unity!           --Ps. cxxxiii.
                                                  1.
      [1913 Webster]

   3. (Math.) Any definite quantity, or aggregate of quantities
      or magnitudes taken as one, or for which 1 is made to
      stand in calculation; thus, in a table of natural sines,
      the radius of the circle is regarded as unity.
      [1913 Webster]

   Note: The number 1, when it is not applied to any particular
         thing, is generally called unity.
         [1913 Webster]

   4. (Poetry & Rhet.) In dramatic composition, one of the
      principles by which a uniform tenor of story and propriety
      of representation are preserved; conformity in a
      composition to these; in oratory, discourse, etc., the due
      subordination and reference of every part to the
      development of the leading idea or the eastablishment of
      the main proposition.
      [1913 Webster]

   Note: In the Greek drama, the three unities required were
         those of action, of time, and of place; that is, that
         there should be but one main plot; that the time
         supposed should not exceed twenty-four hours; and that
         the place of the action before the spectators should be
         one and the same throughout the piece.
         [1913 Webster]

   5. (Fine Arts & Mus.) Such a combination of parts as to
      constitute a whole, or a kind of symmetry of style and
      character.
      [1913 Webster]

   6. (Law) The peculiar characteristics of an estate held by
      several in joint tenancy.
      [1913 Webster]

   Note: The properties of it are derived from its unity, which
         is fourfold; unity of interest, unity of title, unity
         of time, and unity of possession; in other words, joint
         tenants have one and the same interest, accruing by one
         and the same conveyance, commencing at the same time,
         and held by one and the same undivided possession.
         Unity of possession is also a joint possession of two
         rights in the same thing by several titles, as when a
         man, having a lease of land, afterward buys the fee
         simple, or, having an easement in the land of another,
         buys the servient estate.
         [1913 Webster]
         [1913 Webster]

   At unity, at one.

   Unity of type. (Biol.) See under Type.
      [1913 Webster]

   Syn: Union; oneness; junction; concord; harmony. See Union.
        [1913 Webster]

WordNet (r) 3.0 (2006):

unity
    n 1: an undivided or unbroken completeness or totality with
         nothing wanting; "the integrity of the nervous system is
         required for normal development"; "he took measures to
         insure the territorial unity of Croatia" [syn: integrity,
         unity, wholeness]
    2: the smallest whole number or a numeral representing this
       number; "he has the one but will need a two and three to go
       with it"; "they had lunch at one" [syn: one, 1, I,
       ace, single, unity]
    3: the quality of being united into one [syn: oneness,
       unity]

Moby Thesaurus II by Grady Ward, 1.0:

165 Moby Thesaurus words for "unity":
   accord, accordance, affinity, agape, agreement, amity,
   bonds of harmony, brotherly love, calm, caritas,
   cement of friendship, charity, coequality, coherence, cohesion,
   coincidence, collectivity, combination, communion, community,
   community of interests, compatibility, completeness, complex,
   comprehensiveness, concord, concordance, concurrence, conformance,
   congeniality, congruence, congruity, congruousness, consensus,
   consistency, consonance, constancy, continuity, correspondence,
   elementarity, embodiment, empathy, entireness, entirety,
   equability, equality, equanimity, equilibrium, equivalence, esprit,
   esprit de corps, eternity, evenness, exhaustiveness,
   feeling of identity, fellow feeling, fellowship, frictionlessness,
   fullness, fundamentality, glory, good vibes, good vibrations,
   happy family, harmony, holiness, holism, homogeneity, homoousia,
   identity, immutability, impartibility, inclusiveness,
   indiscerptibility, indissolubility, indistinguishability,
   individuality, indivisibility, infinite goodness, infinite justice,
   infinite love, infinite mercy, infinite power, infinite wisdom,
   infinity, infrangibility, infusibility, inseparability,
   insolubility, intactness, integer, integrality, integration,
   integrity, kinship, light, like-mindedness, likeness, love,
   majesty, monism, monolithism, mutuality, no difference,
   omnipotence, omnipotency, omnipresence, omniscience, omnisciency,
   oneness, organic unity, peace, persistence, pervasiveness,
   plainness, purity, rapport, rapprochement, reciprocity,
   resemblance, sameness, self-identity, selfhood, selfness,
   selfsameness, severity, sharing, similarity, similitude,
   simpleness, simplicity, singleness, singularity, solidarity,
   solidity, sovereignty, stability, starkness, steadfastness,
   steadiness, sympathy, symphony, synonymity, synonymousness,
   synonymy, team spirit, thoroughness, total approach, totality,
   ubiquity, unadulteration, unanimity, understanding, unification,
   uniformity, union, uniqueness, unison, uniting, universality,
   unmixedness, unruffledness, unsophistication, whole, wholeness



The Free On-line Dictionary of Computing (30 December 2018):

UNITY

   A high-level parallel language.

   A translator into MPL is available by
   (ftp://sanfrancisco.ira.uka.de/pub/maspar/maspar_unity.tar.Z).

   See also MasPar Unity.

   ["Parallel Program Design", K.M. Chandry and Misra, A-W 1988].

   (1994-11-29)


Bouvier's Law Dictionary, Revised 6th Ed (1856):

UNITY, estates. An agreement or coincidence of certain qualities in the
title of a joint estate or an estate in common.
     2. In a joint estate there must exist four unities; that of interest,
for a joint-tenant cannot be entitled to one period of duration or quantity
of interest in lands, and the other to a different; one cannot be tenant for
life, and the other for years: that of title, and therefore their estate
must be created by one and, the same act; that of time, for their estates
must be vested at one and the same period, as well as by one and the same
title; and lastly, the unity of possession: hence joint-tenants are seised
per my et per tout, or by the half or moiety and by all: that is, each of
them has an entire possession, as well of every parcel as of the whole. 2
Bl. Com. 179-182; Co. Litt. 188.
     3. Coparceners must have the unities of interest, title, and
possession.
     4. In tenancies in common, the unity of possession is alone required. 2
Bl. Com. 192; 2 Bouv. Inst. n. 1861-83. Vide Estate in Common; Estate in
Joint-tenancy; Joint-tenants; Tenant in Common; Tenants, Joint.



U.S. Gazetteer Places (2000):

Unity, WI -- U.S. village in Wisconsin
   Population (2000):    368
   Housing Units (2000): 157
   Land area (2000):     0.988851 sq. miles (2.561111 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.988851 sq. miles (2.561111 sq. km)
   FIPS code:            81850
   Located within:       Wisconsin (WI), FIPS 55
   Location:             44.848191 N, 90.314970 W
   ZIP Codes (1990):     54488
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Unity, WI
    Unity


U.S. Gazetteer Places (2000):

Unity, OR -- U.S. city in Oregon
   Population (2000):    131
   Housing Units (2000): 75
   Land area (2000):     0.462862 sq. miles (1.198807 sq. km)
   Water area (2000):    0.008009 sq. miles (0.020743 sq. km)
   Total area (2000):    0.470871 sq. miles (1.219550 sq. km)
   FIPS code:            76250
   Located within:       Oregon (OR), FIPS 41
   Location:             44.447954 N, 118.191611 W
   ZIP Codes (1990):     97884
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Unity, OR
    Unity


U.S. Gazetteer Places (2000):

Unity, ME -- U.S. Census Designated Place in Maine
   Population (2000):    486
   Housing Units (2000): 319
   Land area (2000):     1.818322 sq. miles (4.709433 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    1.818322 sq. miles (4.709433 sq. km)
   FIPS code:            78220
   Located within:       Maine (ME), FIPS 23
   Location:             44.619003 N, 69.336696 W
   ZIP Codes (1990):     04988
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Unity, ME
    Unity