n. & v.
1. help.
2 financial or material help, esp. given by one country to another.
3 a material source of help (teaching aid).
4 a person or thing that helps.
5 hist. a grant of subsidy or tax to a king.
--v.tr.
1. (often foll. by to + infin.) help.
2 promote or encourage (sleep will aid recovery).
Phrases and idioms:
in aid of in support of. what's this (or all this) in aid of? colloq. what is the purpose of this?
Etymology: ME f. OF a{iuml}de, a{iuml}dier, ult. f. L adjuvare (as AD-, juvare jut- help)