tick, ticking -- (a metallic tapping sound; "he counted the ticks of the clock")
tick -- (any of two families of small parasitic arachnids with barbed proboscis; feed on blood of warm-blooded animals)
check mark, check, tick -- (a mark indicating that something has been noted or completed etc.; "as he called the role he put a check mark by each student's name")
tick -- (a light mattress)
Overview of verb tick
The verb tick has 4 senses
click, tick -- (make a clicking or ticking sound; "The clock ticked away")
tick, ticktock, ticktack, beat -- (make a sound like a clock or a timer; "the clocks were ticking"; "the grandfather clock beat midnight")
check, check off, mark, mark off, tick off, tick -- (put a check mark on or near or next to; "Please check each name on the list"; "tick off the items"; "mark off the units")