from The American Heritage® Dictionary of the English Language, 4th Edition
- transitive v. To set in motion; make active or more active.
- transitive v. To organize or create (a military unit, for example): activate the National Guard.
- transitive v. To treat (sewage) with aeration and bacteria to aid decomposition.
- transitive v. Chemistry To accelerate a reaction in, as by heat.
- transitive v. Physics To make (a substance) radioactive.
- transitive v. Biology To convert (certain biological compounds) into biologically active derivatives.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To put into action, to put to work.
- v. To turn on.
from the GNU version of the Collaborative International Dictionary of English
- transitive v. To make active.
from The Century Dictionary and Cyclopedia
- To make active; intensify.
- In physics, to render active; specifically, to make radioactive by exposure to the influence of a radioactive substance; to ionize. See radioactivity.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. put in motion or move to act
- v. make active or more active
- v. make more adsorptive
- v. make (substances) radioactive
- v. aerate (sewage) so as to favor the growth of organisms that decompose organic matter
Sorry, no etymologies found.