The Collaborative International Dictionary of English v.0.48:

Admissible \Ad*mis"si*ble\, a. [F. admissible, LL. admissibilis.
   See Admit.]
   Entitled to be admitted, or worthy of being admitted; that
   may be allowed or conceded; allowable; as, the supposition is
   hardly admissible. -- Ad*mis"si*ble*ness, n. --
   Ad*mis"si*bly, adv.
   [1913 Webster]

WordNet (r) 3.0 (2006):

admissible
    adj 1: deserving to be admitted; "admissible evidence" [ant:
           inadmissible]

Moby Thesaurus II by Grady Ward, 1.0:

154 Moby Thesaurus words for "admissible":
   OK, a propos, absolute, acceptable, ad rem, adducible, adequate,
   admissive, admissory, agreeable, all right, allowable, alright,
   appertaining, applicable, applying, apposite, appropriate, apropos,
   attestative, attestive, authentic, based on, belonging,
   better than nothing, certain, circumstantial, cogent, conclusive,
   condonable, convincing, credible, cumulative, damning, decent,
   decisive, defensible, desirable, determinative, dispensable,
   documentary, documented, eligible, enfranchised, evidential,
   evidentiary, ex parte, excusable, exemptible, expiable,
   eye-witness, factual, fair, fairish, final, firsthand, fit, fitted,
   forgivable, founded on, germane, good enough, goodish, grounded on,
   hearsay, hospitable, imbibitory, implicit, in point,
   incontrovertible, indicative, indisputable, ingestive, inoffensive,
   intromissive, intromittent, invitatory, inviting, involving,
   irrefutable, irresistible, just, justifiable, lawful, legal,
   legitimate, legitimized, licit, logical, material, moderate,
   not amiss, not bad, not half bad, not so bad, nuncupative, okay,
   open, overwhelming, pardonable, passable, permissible, pertaining,
   pertinent, plausible, presentable, presumptive, pretty good,
   probative, qualified, rational, reasonable, receivable, receptible,
   receptive, recipient, relevant, reliable, remissible, respectable,
   sanctionable, sane, satisfactory, sensible, significant, sound,
   sufficient, suggestive, suitable, sure, symptomatic, telling,
   tenable, tidy, to the point, to the purpose, tolerable,
   unexceptionable, unobjectionable, valid, venial, viable,
   vindicable, warrantable, weighty, welcoming, well-argued,
   well-founded, well-grounded, wholesome, with voice, with vote,
   workmanlike, worthy



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

admissible

    A description of a search algorithm that is
   guaranteed to find a minimal solution path before any other
   solution paths, if a solution exists.  An example of an
   admissible search algorithm is A* search.

   (1999-07-19)