A whole number is a number with nothing after the point. Round it to a whole number, a whole number of boxes, only whole numbers.
Counting things gives whole numbers, since half a chair is not a chair. Mathematicians distinguish whole numbers from integers over whether negatives are included, and school usage is looser.
1nounwhole numberA number with nothing after the point.
“Give the answer as a whole number of days.”
whole number is a number.
Also accepted in games: integer
Practised in Numbers & Measurement