Meanings
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1
adj
Behaving in an angry, threatening way and ready to attack or argue.
The dog became aggressive when strangers approached.
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2
adj
Determined and forceful in pursuing your goals.
The company took an aggressive approach to expanding overseas.
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3
adj
Of a disease, spreading quickly and hard to control.
She was diagnosed with an aggressive form of cancer.
Thesaurus
Etymology
Etymology tree Proto-Indo-European *h₂éd Proto-Italic *ad Proto-Italic *ad- Latin ad- Proto-Indo-European *gʰredʰ-der. Latin gradior Latin aggredior Latin aggressuslbor. English aggress Proto-Indo-European *-wósder. Latin -īvus Old French -ifbor. Middle English -yf English -ive English aggressive From aggress + -ive. Compare with French agressif.