Definitions from Wiktionary ( )

▸ noun:  A tiny woodland arachnid of the suborder Ixodida.
▸ noun:  A relatively quiet but sharp sound generally made repeatedly by moving machinery.
▸ noun:  A mark on any scale of measurement; a unit of measurement.
▸ noun:  (computing) A jiffy (unit of time defined by basic timer frequency).
▸ noun:  (colloquial) A short period of time, particularly a second.
▸ noun:  (video games) A periodic increment of damage or healing caused by an ongoing status effect.
▸ noun:  (gaming) Each of the fixed time periods, in a tick-based game, in which players or characters may perform a set number of actions.
▸ noun:  (Australia, New Zealand, British, Ireland) A mark (✓) made to indicate agreement, correctness or acknowledgement.
▸ noun:  (birdwatching) A bird seen (or heard) by a birdwatcher, for the first time that day, year, trip, etc., and thus added to a list of observed birds.
▸ noun:  (ornithology) A whinchat (Saxicola rubetra).
▸ noun:  A tap or light touch.
▸ noun:  A slight speck.
▸ verb:  To make a clicking noise similar to the movement of the hands in an analog clock.
▸ verb:  To make a tick or checkmark.
▸ verb:  (informal, intransitive) To work or operate, especially mechanically.
▸ verb:  To strike gently; to pat.
▸ verb:  (birdwatching, transitive) To add (a bird) to a list of birds that have been seen (or heard).
▸ noun:  (uncountable) Ticking.
▸ noun:  A sheet that wraps around a mattress; the cover of a mattress, containing the filling.
▸ noun:  (UK, colloquial) Credit, trust.
▸ verb:  (intransitive) To go on trust, or credit.
▸ verb:  (transitive) To give tick; to trust.
▸ noun:  (obsolete, place names) A goat.

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