from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Characterized by either a complete response or by a total lack of response or effect, as in neurological action above a threshold: "Nerve impulses follow the All or None Law—that is, a nerve impulse generated by a weak stimulus is just as strong as one generated by a strong stimulus” ( Fundamentals of Biology).
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. occurring completely or not occurring at all
Sorry, no etymologies found.