from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The amount by which something, especially a pollutant, exceeds a standard or permissible measurement.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An instance where an action, activity or substance exceeds a limit set by medical or legal practice.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. (geology) the probability that an earthquake will generate a level of ground motion that exceeds a specified reference level during a given exposure time
Sorry, no etymologies found.