#1 tick n. [ticking] a metallic tapping sound; "he counted the ticks of the clock". wn
#2 tick v. [click] make a clicking or ticking sound; "The clock ticked away". wn
#3 tick n. any of two families of small parasitic arachnids with barbed proboscis; feed on blood of warm-blooded animals. wn
#4 tick v. [ticktock, ticktack, beat] make a sound like a clock or a timer; "the clocks were ticking"; "the grandfather clock beat midnight". wn
#5 tick n. [check mark, check] 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". wn
vizzz