(of a clock or other timer) To count the time down to zero.

(of time) To count down to zero (i.e. signaling the end (or start) of something).

present participle of tick off

The sound of a ticking clock. / (colloquial) A warning of some fateful impending event.

The sound of a ticking clock. / (journalism) A step-by-step account of an event or timeline.

A water mite.

(Australia, banking, informal) A process that allows an account-holder to sign up to another financial institution, with the new bank taking care of all transfers, fees, and paperwork.

Alternative form of tick and flick

(onomatopoeia) The sound of repeated tapping, knocking, or clicking. / (countable) A device used to tap on a window or door from a distance.

plural of tick bite