noun

1. a slight, sharp sound like that of a door latch snapping into place
2. a mechanical device, as a catch or pawl, that clicks into position
3. Phonet. any of a class of stops, common in some African languages, made by touching the tongue to the roof of the mouth, drawing in the breath, and abruptly withdrawing the tongue from the roof of the mouth the sound represented in English by the spelling “tsk” is a click
4. Informal a flash of insight; epiphany

Etymology: echoic, but assoc. with ME clike, a locking latch (< OFr clique) & cliken, to chatter (< OFr cliquer)

intransitive verb

1. to make a click
2. Informal
   1. to be suddenly clear or comprehensible
   2. to fit, work, or get along together successfully
   3. to be a success
3. Comput. to select or activate an icon, menu item, etc. by positioning the cursor over it and pressing a mouse button: usually with on

transitive verb