an adhesive label
"She carefully peeled off the price sticker from the new toy before taking it home."
Something or someone that sticks (pierces, or adheres).
"The sharp thorn acted as a sticker and pierced my finger when I pulled it away too quickly."
In plain English: A sticker is a small piece of paper with an image on it that sticks to surfaces when you press it down and remove its backing.
"She put a colorful sticker on her water bottle to keep track of who finished their drink first."
Usage: As a noun, "sticker" most commonly refers to the adhesive label itself rather than someone who sticks things. Use this word when describing small paper items with glue on the back that can be peeled off and attached to surfaces.
To apply one or more stickers to (something)
"She carefully stuck a bright yellow star sticker onto her backpack."
In plain English: To sticker means to put a label on something, but as a verb it usually refers to decorating an object by sticking images or designs onto its surface with glue or adhesive tape.
"She stuck her name on the envelope with a small piece of tape."
comparative form of stick: more stick (stickier).
"The sticky notes were a bit sticker than usual after sitting in the sun too long."
"We need to buy some sticker prices for all those extra items on sale today."
The word sticker comes from the verb stick, which originally meant to pierce or adhere. It was formed by adding the suffix -er to create a noun for something that sticks firmly in place.