tick

a metallic tapping sound

“he counted the ticks of the clock”

make a sound like a clock or a timer

“the clocks were ticking”

sew

“tick a mattress”

make a clicking or ticking sound

“The clock ticked away”

a mark indicating that something has been noted or completed etc.

put a check mark on or near or next to

“tick off the items”

a light mattress

any of two families of small parasitic arachnids with barbed proboscis; feed on blood of warm-blooded animals