The Collaborative International Dictionary of English v.0.48:

Click \Click\, n.
   1. A slight sharp noise, such as is made by the cocking of a
      pistol.
      [1913 Webster]

   2. A kind of articulation used by the natives of Southern
      Africa, consisting in a sudden withdrawal of the end or
      some other portion of the tongue from a part of the mouth
      with which it is in contact, whereby a sharp, clicking
      sound is produced. The sounds are four in number, and are
      called cerebral, palatal, dental, and lateral clicks or
      clucks, the latter being the noise ordinarily used in
      urging a horse forward.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Click \Click\, v. t. [OE. kleken, clichen. Cf. Clutch.]
   To snatch. [Prov. Eng.] --Halliwell.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Click \Click\ (kl[i^]k), v. i. [imp. & p. p. Clicked
   (kl[i^]kt); p. pr. & vb. n. Clicking.] [Prob. an
   onomatopoetic word: cf. OF. cliquier. See Clack, and cf.
   Clink, Clique.]
   To make a slight, sharp noise (or a succession of such
   noises), as by gentle striking; to tick.
   [1913 Webster]

         The varnished clock that clicked behind the door.
                                                  --Goldsmith.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Click \Click\, n. [Cf. 4th Click, and OF. clique latch.]
   1. A detent, pawl, or ratchet, as that which catches the cogs
      of a ratchet wheel to prevent backward motion. See Illust.
      of Ratched wheel.
      [1913 Webster]

   2. The latch of a door. [Prov. Eng.]
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Click \Click\, v. t.
   1. To move with the sound of a click.
      [1913 Webster]

            She clicked back the bolt which held the window
            sash.                                 --Thackeray.
      [1913 Webster]

   2. To cause to make a clicking noise, as by striking
      together, or against something.
      [1913 Webster]

            [Jove] clicked all his marble thumbs. --Ben Jonson.
      [1913 Webster]

            When merry milkmaids click the latch. --Tennyson.
      [1913 Webster]

WordNet (r) 3.0 (2006):

click
    n 1: a short light metallic sound [syn: chink, click,
         clink]
    2: a stop consonant made by the suction of air into the mouth
       (as in Bantu) [syn: suction stop, click]
    3: a hinged catch that fits into a notch of a ratchet to move a
       wheel forward or prevent it from moving backward [syn:
       pawl, detent, click, dog]
    4: depression of a button on a computer mouse; "a click on the
       right button for example" [syn: click, mouse click]
    v 1: move or strike with a noise; "he clicked on the light";
         "his arm was snapped forward" [syn: snap, click]
    2: make a clicking or ticking sound; "The clock ticked away"
       [syn: click, tick]
    3: click repeatedly or uncontrollably; "Chattering teeth" [syn:
       chatter, click]
    4: cause to make a snapping sound; "snap your fingers" [syn:
       snap, click, flick]
    5: produce a click; "Xhosa speakers click"
    6: make a clucking sounds, characteristic of hens [syn: cluck,
       click, clack]
    7: become clear or enter one's consciousness or emotions; "It
       dawned on him that she had betrayed him"; "she was penetrated
       with sorrow" [syn: click, get through, dawn, come
       home, get across, sink in, penetrate, fall into
       place]

Moby Thesaurus II by Grady Ward, 1.0:

64 Moby Thesaurus words for "click":
   be blooded, be successful, bump, catch on, chink, clack, clink,
   clop, clump, clunk, come off, connect, crack, cracking, crackle,
   crackling, crepitate, crepitation, crump, decrepitate,
   decrepitation, dull thud, farewell, flick, flump, go,
   go great guns, go off, go over, go over big, go to town, graduate,
   make a hit, meet with success, pad, pan out, pass, pat, patter,
   pitapat, pitter-patter, plump, plunk, pop, prevail, prosper,
   prove out, qualify, rap, sizzling, snap, snapping, spit, spitting,
   succeed, take, tap, thud, thump, tick, tinkle, tunk, work well,
   work wonders



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

click

    To press and release a button on a mouse or
   other pointing device.  This generates an event, also
   specifying the screen position, which is processed by the
   window manager or application program.

   On a mouse with more than one button, the unqualified term
   usually implies pressing the left-most button (with the right
   index finger), other buttons would be qualified,
   e.g. "right-click".  Multiple clicks in quick succession,
   e.g. a double-click, often have a different meaning from slow
   single clicks.  Keyboard modifiers may also be used,
   e.g. "shift-click", meaning to hold down the shift key on the
   keyboard while clicking the mouse button.

   If the mouse moves while the button is pressed then this is a
   drag.

   (1995-03-14)