Webster’s Revised Unabridged Dictionary · 1913
Minus
Mi′nus (mī′nŭs), 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, or quantities to be subtracted. See Negative sign, under Negative.