The Collaborative International Dictionary of English v.0.48:
Mulier \Mu"li*er\, n. [L., a woman.]
1. A woman.
(a) Lawful issue born in wedlock, in distinction from an
elder brother born of the same parents before their
marriage; a lawful son.
(b) (Civ. Law) A woman; a wife; a mother. --Blount.
Bouvier's Law Dictionary, Revised 6th Ed (1856):
MULIER. A woman, a wife; sometimes it is used to designate a marriageable
virgin, and in other cases the word mulier is employed in opposition to
virgo. Poth. Pand. tom. 22, h.t. In its most proper signification, it means
2. A son or a daughter, born of a lawful wife, is called filius
mulieratus or filia mulierata, a son mulier, or a daughter mulier. The term
is used always in contradistinction to a bastard; mulier being always
legitimate. Co. Litt. 243.
3. When a man has a bastard son, and afterwards marries the mother, and
has by her another son, the latter is called the mulier puisne. 2 Bl. Com.