KLIK

noun

1. A brief, sharp, not particularly loud, relatively high-pitched sound produced by the impact of something small and hard against something hard, such as by the operation of a switch, a lock or a latch, or a finger pressed against the thumb and then released to strike the hand.
2. An ingressive sound made by coarticulating a velar or uvular closure with another closure.
3. Sound made by a dolphin.

noun

1. A detent, pawl, or ratchet, such as that which catches the cogs of a ratchet wheel to prevent backward motion.
2. The latch of a door.

noun

1. A kilometer.
2. (usually in the plural) Kilometres per hour.