Meaning of “negative” - Learner’s Dictionary

negative

adjective uk us /ˈneɡətɪv/
NO ENTHUSIASM

B1 not having enthusiasm or positive opinions about something:

negative feelings
Many people have a negative attitude towards ageing.
BAD

B2 A negative effect is bad and causes damage to something:

Terrorist threats have had a very negative impact on tourism.
MEDICINE

If the result of a test to prove if someone is pregnant or sick is negative, that person is not pregnant or sick.

NUMBERS

A negative number is less than zero.

GRAMMAR

A2 In language, a negative word or phrase expresses the meaning 'no' or 'not'.

(Definition of “negative adjective” from the Cambridge Learner’s Dictionary © Cambridge University Press)