ag ‧ gres ‧ sive S3 /əˈɡresɪv/ BrE AmE adjective
1 . behaving in an angry threatening way, as if you want to fight or attack someone:
Jim’s voice became aggressive.
Teachers apparently expect a certain amount of aggressive behaviour from boys.
2 . very determined to succeed or get what you want:
A successful businessman has to be aggressive.
an aggressive marketing campaign
3 . an aggressive disease spreads quickly in the body:
an aggressive form of breast cancer
—aggressively adverb
—aggressiveness noun [uncountable]