1 [only before noun] British English
used to talk about a disadvantage of a thing or situation [≠ plus]:
'Any minus points?' 'Well, the engine is rather noisy.'
On the minus side, there is no free back-up service if things go wrong.
less than zero - used especially when talking about temperatures:
At night temperatures sometimes fall to minus 30°.
a minus quantity
a mark used in a system of judging students' work. An 'A minus' is slightly lower than a 'A', but higher than a 'B'. [≠ plus]