aggressive

[ uh-gres-iv ]
/ əˈgrɛs ɪv /
|

adjective

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.
Medicine/Medical.
  1. (of a disease or tumor) spreading rapidly or highly invasive; difficult or impossible to treat successfully.
  2. pertaining to a risky surgery or treatment, or to a medication that has grave side effects: aggressive chemotherapy.

Origin of aggressive

First recorded in 1815–25; aggress(ion) + -ive
SYNONYMS FOR aggressive
ANTONYMS FOR aggressive
Related forms
Can be confusedaggressive passive
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for over-aggressive

aggressive

/ (əˈɡrɛsɪv) /

adjective

quarrelsome or belligerentan aggressive remark
assertive; vigorousan aggressive business executive
Derived Formsaggressively, adverbaggressiveness, noun
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 over-aggressive

aggressive


adj.

1791, from Latin aggress-, past participle stem of aggredi (see aggression) + -ive. In psychological use from 1913, first in translations of Freud. Related: Aggressively; aggressiveness.

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for over-aggressive

aggressive

[ ə-grĕsĭv ]

adj.

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.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.