Maths operator

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Minus \Mi"nus\ (m[imac]"n[u^]s), a. [L. See Minor , and cf. Mis- pref. from the French.] (Math.) Less; requiring to be subtracted; negative; as, a minus quantity. Minus sign (Math.), the sign [-] denoting minus, or less, prefixed to negative quantities, ...

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
noun EXAMPLES FROM CORPUS ▪ Instead, work backwards from the end of the field, using a minus sign .

WordNet Word definitions in WordNet
n. a sign indicating the operation of subtraction

Wiktionary Word definitions in Wiktionary
n. (context mathematics English) The symbol − or - used to denote the operation of subtraction and to indicate that a number is negative.