Definitions
1.verbTo make a clicking noise similar to the movement of the hands in an analog clock.
2.verbTo make a tick or checkmark.
3.verbTo work or operate, especially mechanically."He took the computer apart to see how it ticked."
4.verbTo strike gently; to pat.
5.verbTo add a bird to a list of birds that have been seen (or heard).
6.verbTo go on trust, or credit.
7.verbTo give tick; to trust.
8.adjectiveTicked off; annoyed.