tick

(noun) a metallic tapping sound. Synonyms: ticking. Example: "He counted the ticks of the clock."

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

(noun) a mark indicating that something has been noted or completed etc.. Synonyms: check mark, check. Example: "As he called the role he put a check mark by each student's name."

(noun) a light mattress.

(verb) make a clicking or ticking sound. Synonyms: click. Example: "The clock ticked away."

(verb) make a sound like a clock or a timer. Synonyms: ticktock, ticktack, beat. Examples: "The clocks were ticking." "The grandfather clock beat midnight."

(verb) sew. Synonyms: retick. Example: "Tick a mattress."

(verb) put a check mark on or near or next to. Synonyms: check, check off, mark, mark off, tick off. Examples: "Please check each name on the list." "Tick off the items." "Mark off the units."