tick

/tɪk/
noun
  1. A small, blood-sucking insect that attaches to animals and humans, often carrying diseases.
    • The dog had a tick behind its ear.
    • After hiking in the woods, check your skin for ticks.
    • Ticks can transmit Lyme disease to people.
  2. A light, repeated clicking sound, like that of a clock or watch.
    • I could hear the tick of the metronome as I practiced piano.
    • The only sound in the room was the tick of the old grandfather clock.
    • The tick of the timer told me the cookies were almost done.
  3. A small mark (✓) used to show that something is correct or has been done.
    • Put a tick next to each completed task on your list.
    • The teacher put a red tick on my correct answer.
    • I added a tick to the box to confirm my choice.
  4. A very small change in the price of a stock or other financial asset.
    • A tick is the smallest possible price change in a trade.
    • The stock moved up one tick to $50.01.
    • Traders watch every tick of the market.
verb
  1. To make a light, repeated clicking sound, like a clock or watch.
    • The metronome ticked steadily while she played.
    • I could hear the engine ticking as it cooled down.
    • The old clock ticked loudly in the hallway.
  2. To mark an item with a check mark (✓) to show it is done or correct.
    • The teacher ticked the correct answers on the test.
    • Please tick the box next to your preferred option.
    • I ticked off each item on my shopping list.
  3. To function or operate in a particular way (often used in phrases like 'what makes someone tick').
    • She's curious about what makes her boss tick.
    • I've never understood what makes him tick.
    • The team is trying to figure out what makes the new software tick.
Synonyms