What is the meaning of Amide?

Any derivative of an oxoacid in which the hydroxyl group has been replaced with an amino or substituted amino group; especially such derivatives of a carboxylic acid, the carboxamides or acid amides

Any ionic derivative of ammonia in which a hydrogen atom has been replaced with a metal cation (R-NH or R2N)

amide

plural of amida

Source: wiktionary.org