Not significant or important enough to be worth considering; trifling.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "negligible" in a sentence
"Officials tell us that the amount of anthrax found in the mail was what they call negligible, that it actualy required two tests to even find it, so they don't think it's a large amount."
"We are in negligible credit card debt compared to others with four or five times the income."
"Besides, Ireland is really not so negligible from the commercial-theatrical point of view as some of our more despondent patriots seem to suppose."