Definition

A quantity of something that fills a cup.

Example

She poured a cupful of sugar into the bowl.

Conversation

Could you pass me a cupful of sugar for the recipe?

Sure! How sweet do you want it to be?

Just one cupful should be enough, thanks!

No problem, I’ll make sure to measure it out perfectly.

Synonyms & Antonyms

Root Explanation

Cupful → It is formed from "cup" (from Old English "cuppe", meaning a small container for drinking) and "-ful" (meaning full of). The word "cupful" means a quantity that fills a cup.

Memory Tip

Think of a 'cup' as a small container and '-ful' meaning full of something — so a cupful is simply a quantity that fills a cup.

Visually Confused Words