The Collaborative International Dictionary of English v.0.48:

Connective \Con*nect"ive\, a.
   Connecting, or adapted to connect; involving connection.
   [1913 Webster]

   Connection tissue (Anat.) See Conjunctive tissue, under
      Conjunctive.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Connective \Con*nect"ive\, n.
   That which connects. Specifically:
   (a) (Gram.) A word that connect words or sentences; a
       conjunction or preposition.
   (b) (Bot.) That part of an anther which connects its
       thec[ae], lobes, or cells.
       [1913 Webster]

WordNet (r) 3.0 (2006):

connective
    adj 1: connecting or tending to connect; "connective remarks
           between chapters"; "connective tissue in animals";
           "conjunctive tissue in plants"
    n 1: an uninflected function word that serves to conjoin words
         or phrases or clauses or sentences [syn: conjunction,
         conjunctive, connective, continuative]
    2: an instrumentality that connects; "he soldered the
       connection"; "he didn't have the right connector between the
       amplifier and the speakers" [syn: connection, connexion,
       connector, connecter, connective]

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

connective

    An operator used in first order logic to combine two
   logical formulas.

   (2014-05-04)