• 1. a recurrent metallic tapping or clicking sound, such as that made by a clock or watch
• 2. a moment or instant
• 3. a mark ( ) or dash used to check off or indicate the correctness of something
• 4. the smallest increment of a price fluctuation in a commodity exchange. Tick size is usually 0.01% of the nominal value of the trading unit
• 5. to produce a recurrent tapping sound or indicate by such a sound
• 6. to mark or check (something, such as a list) with a tick
• 7. See also tick off tick over
• 8. C13:...

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• 1. any of various small parasitic arachnids of the families Ixodidae ( hard ticks ) and Argasidae, ( soft ticks ), typically living on the skin of warm-blooded animals and feeding on the blood and tissues of their hosts: order Acarina (mites and ticks) - See also sheep tick
• 2. any of certain other arachnids of the order Acarina
• 3. any of certain insects of the dipterous family Hippoboscidae that are ectoparasitic on horses, cattle, sheep, etc, esp the sheep ked
• 4. Old English ticca;...

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• 1. the strong covering of a pillow, mattress, etc
• 2. short for ticking
• 3. C15: probably from Middle Dutch t i ke; related to Old High German ziecha pillow cover, Latin t e ca case, Greek th e k e

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• 1. account or credit (esp in the phrase on tick )
• 2. C17: shortened from ticket

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