aid (ād)
intr. & tr.v., aid·ed, aid·ing, aids.
To help or furnish with help, support, or relief. See synonyms at help.

n.

1. The act or result of helping; assistance.
2. 1. An assistant or helper.
   2. A device that assists: visual aids such as slides.
   3. A hearing aid.
3. An aide or aide-de-camp.
4. A monetary payment to a feudal lord by a vassal in medieval England.

[Middle English aiden, from Old French aider, from Latin adiūtāre, frequentative of adiuvāre, to help : ad-, to + iuvāre, to help.]

aider aid'er n.

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The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.

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