The Collaborative International Dictionary of English v.0.48:

Reflexive \Re*flex"ive\ (-?v), a.
   1. [Cf. F. r['e]flexif.] Bending or turned backward;
      reflective; having respect to something past.
      [1913 Webster]

            Assurance reflexive can not be a divine faith.
                                                  --Hammond.
      [1913 Webster]

   2. Implying censure. [Obs.] "What man does not resent an ugly
      reflexive word?" --South.
      [1913 Webster]

   3. (Gram.) Having for its direct object a pronoun which
      refers to the agent or subject as its antecedent; -- said
      of certain verbs; as, the witness perjured himself; I
      bethought myself. Applied also to pronouns of this class;
      reciprocal; reflective.
      [1913 Webster] -- Re*flex"ive*ly, adv. --
      Re*flex"ive*ness, n.
      [1913 Webster]

WordNet (r) 3.0 (2006):

reflexive
    adj 1: without volition or conscious control; "the automatic
           shrinking of the pupils of the eye in strong light"; "a
           reflex knee jerk"; "sneezing is reflexive" [syn:
           automatic, reflex(a), reflexive]
    2: referring back to itself [syn: reflexive, self-referent]
    n 1: a personal pronoun compounded with -self to show the
         agent's action affects the agent [syn: reflexive pronoun,
         reflexive]

Moby Thesaurus II by Grady Ward, 1.0:

54 Moby Thesaurus words for "reflexive":
   active, active voice, antiphonal, automatic, blind, casual,
   compulsive, conditioned, forced, gut, ill-advised, ill-considered,
   ill-devised, impulsive, inadvertent, indeliberate, instinctive,
   involuntary, mechanical, medio-passive, middle, middle voice,
   passive, passive voice, reacting, reactionary, reactive, reflex,
   refluent, respondent, responding, responsive, retroactionary,
   retroactive, revulsive, snap, spontaneous, unadvised, uncalculated,
   unconscious, unconsidered, undeliberate, undeliberated, undesigned,
   unintended, unintentional, unmeditated, unpremeditated, unstudied,
   unthinking, unwilled, unwilling, unwitting, voice



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

reflexive

    A relation R is reflexive if, for all x, x R x.

   Equivalence relations, pre-orders, partial orders and
   total orders are all reflexive.

   (1999-01-28)