To keep quiet or keep a secret.

plural of tick-tack

plural of tick-trefoil

A tick of the family Ixodidae, especially one engorged with blood.

Dermacentor variabilis, a tick that carries bacteria responsible for several diseases in humans.

(writing) A literary device in which the protagonist has a strict time limit, used to heighten tension. / Used other than figuratively or idiomatically: see tick, clock.

(idiomatic, almost always preceded by the and often followed by for) Time is running out; a deadline is approaching.

(intransitive or transitive, of events, time or time-keeping devices) To continue over time.

plural of ticking-off

One of several species in the genus Desmodium in the legume family