- characterized by or tending toward unprovoked offensives, attacks, invasions, or the like; militantly forward or menacing: aggressive acts against a neighboring country.
- making an all-out effort to win or succeed; competitive: an aggressive basketball player.
- vigorously energetic, especially in the use of initiative and forcefulness: an aggressive salesperson.
- boldly assertive and forward; pushy: an aggressive driver.
- emphasizing maximum growth and capital gains over quality, security, and income: an aggressive mutual fund.
- (of a disease or tumor) spreading rapidly or highly invasive; difficult or impossible to treat successfully.
- pertaining to a risky surgery or treatment, or to a medication that has grave side effects: aggressive chemotherapy.
Origin of aggressive
SynonymsSee more synonyms for aggressive on Thesaurus.com
1. pugnacious, militant. 2. forceful, enterprising, assertive.
1. friendly. 2. retiring, shy, timid, hesitant.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- excessively quarrelsome or belligerent
- quarrelsome or belligerentan aggressive remark
- assertive; vigorousan aggressive business executive
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for overaggressive
Online Etymology Dictionary, © 2010 Douglas Harper
- Characterized by aggression.
- Inclined to behave in a hostile fashion.
- Tending to spread quickly, as a tumor; fast-growing.
- Characterized by or inclined toward vigorous or intensive medical treatment.