|Origin:||Old English ticia|
1 [countable]SE British English
a mark written next to an answer, something on a list etc, to show that it is correct or has been dealt with [= check American English] ➔ cross2 (2b)
Put a tick in the box if you agree with this statement.
a very small animal like an insect that lives under the skin of other animals and sucks their blood
the short repeated sound that a clock or watch makes every second
4 [countable] spoken especially British English
a very short time [= moment]:
I'll be with you in a tick (=soon).
It'll only take two ticks.
5 British English informal old-fashioned
if you buy something on tick, you arrange to take it now and pay later [= credit]