The Collaborative International Dictionary of English v.0.48:

Kiss \Kiss\, n. [OE. kiss, derived under the influence of the
   verb from the older form coss, AS. coss. See Kiss, v.]
   [1913 Webster]
   1. A salutation with the lips, as a token of affection,
      respect, etc.; as, a parting kiss; a kiss of
      reconciliation.
      [1913 Webster]

            Last with a kiss, she took a long farewell.
                                                  --Dryden.
      [1913 Webster]

            Dear as remembered kisses after death. --Tennyson.
      [1913 Webster]

   2. A small piece of confectionery.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Kiss \Kiss\ (k[i^]s), v. t. [imp. & p. p. Kissed (k[i^]st);p.
   pr. & vb. n. Kissing.] [OE. kissen, cussen, AS. cyssan, fr.
   coss a kiss; of uncertain origin; akin to D. kus, G. kuss,
   Icel. koss.]
   1. To salute with the lips, as a mark of affection,
      reverence, submission, forgiveness, etc.
      [1913 Webster]

            He . . . kissed her lips with such a clamorous
            smack,
            That at the parting all the church echoed. --Shak.
      [1913 Webster]

   2. To touch gently, as if fondly or caressingly.
      [1913 Webster]

            When the sweet wind did gently kiss the trees.
                                                  --Shak.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Kiss \Kiss\, v. i.
   1. To make or give salutation with the lips in token of love,
      respect, etc.; as, kiss and make friends.
      [1913 Webster]

   2. To meet; to come in contact; to touch fondly.
      [1913 Webster]

            Like fire and powder,
            Which as they kiss consume.           --Shak.
      [1913 Webster]

            Rose, rose and clematis,
            Trail and twine and clasp and kiss.   --Tennyson.
      [1913 Webster]

   Kissing comfit, a perfumed sugarplum to sweeten the breath.
      [Obs or Prov. End.] --Shak.
      [1913 Webster]

WordNet (r) 3.0 (2006):

kiss
    n 1: the act of caressing with the lips (or an instance thereof)
         [syn: kiss, buss, osculation]
    2: a cookie made of egg whites and sugar
    3: any of several bite-sized candies [syn: kiss, candy kiss]
    4: a light glancing touch; "there was a brief kiss of their
       hands in passing"
    v 1: touch with the lips or press the lips (against someone's
         mouth or other body part) as an expression of love,
         greeting, etc.; "The newly married couple kissed"; "She
         kissed her grandfather on the forehead when she entered the
         room" [syn: snog, kiss, buss, osculate]
    2: touch lightly or gently; "the blossoms were kissed by the
       soft rain"

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

KISS

   Early system on IBM 650.  Listed in CACM 2(5):16 (May 1959).


The Devil's Dictionary (1881-1906):

KISS, n.  A word invented by the poets as a rhyme for "bliss."  It is
supposed to signify, in a general way, some kind of rite or ceremony
appertaining to a good understanding; but the manner of its
performance is unknown to this lexicographer.