Tick

What does TICK mean?

1. noun

   a metallic tapping sound

   “he counted the ticks of the clock”

2. verb

   make a clicking or ticking sound

   “The clock ticked away”

3. noun

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

4. verb

   make a sound like a clock or a timer

   “the clocks were ticking”

Definitions from WordNet 3.1, Princeton University.