(transitive, colloquial) To subtract.

(mathematics) The minus sign (−). / (mathematics) A negative quantity. / A downside or disadvantage.

Being a negative quantity; pertaining to a deficit or reduction. / That is below zero by (a specified amount) on a scale. / (colloquial, obsolete) Worse off than before; out of pocket.

(mathematics) Made less or reduced by (followed by an expression of number or quantity). / (informal) Without; deprived of.

A surname.

(education) A grade lower than "A" and higher than "B plus".

(arithmetic) The symbol −, used to denote the operation of subtraction or to indicate that a number is negative.

A (generally hypothetical) grade lower than an "F"; a grade representing not merely a failure, but a complete and utter failure.

plural of minus sign

The symbol -, used as a hyphen, a minus sign and a dash.