from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Severe or radical in nature; extreme: the drastic measure of amputating the entire leg; drastic social change brought about by the French Revolution.
- adj. Taking effect violently or rapidly: a drastic emetic.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Extreme, severe.
- adj. Acting rapidly or violently.
- adj. Extremely severe or extensive.
from the GNU version of the Collaborative International Dictionary of English
- adj. Acting rapidly and violently; efficacious; powerful; -- opposed to
from The Century Dictionary and Cyclopedia
- Effective; efficacious; powerful; acting with force or violence; vigorous: as, a drastic cathartic. Compare cathartic, adjective
- n. A medicine which speedily and effectually purges.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. forceful and extreme and rigorous
Greek drastikos, active, from drastos, to be done, from drān, to do.(American Heritage® Dictionary of the English Language, Fourth Edition)
Ancient Greek δραστικός (drastikos, "active, efficient"), from δρᾶσις (drasis, "strength, efficacy"), itself from δράω (drao, "to do") (Wiktionary)