ticks
n. countable B1 Intermediate US //ˈtɪks// UK //tˈɪks// ticks
n. small marks (✓) that show something is correct or finished. They can also be tiny insects that bite and stick to your skin.
n. marks used to indicate that an item is correct, verified, or chosen; also refers to small parasitic arachnids that attach to the skin of animals and humans to feed on blood.
Please put ticks next to the items you have finished.
After checking the inventory list, the manager placed green ticks beside every item that had arrived in the warehouse.
The researcher meticulously added ticks to the observation log while simultaneously checking the dog's fur for any parasitic ticks gathered during the field walk.
Usage
Plural form of 'tick'. When referring to the mark, it is often called a 'check mark' in American English.