Tick/tɪk/ Definition 1 of 5Pro Tip 1/2Onomatopoeic origin The word 'tick' mimics the sound it describes, often used for clocks and timers. The ticking of her wristwatch was soothing. Pro Tip 2/2Rhythm indication 'Tick' can suggest a steady pace or rhythm, similar to a heartbeat or metronome. He ran to the beat of his heart's tick.