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]

The Free On-line Dictionary of Computing (19 January 2023):

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)