Definition of amine in US English:



  • An organic compound derived from ammonia by replacement of one or more hydrogen atoms by organic groups.

    • ‘Ammonia and the organic amines, molecules in which one or more of the hydrogen atoms of ammonia are replaced by organic groups, are weak bases.’
    • ‘In the production of nylon an amine reacts with a carboxylic acid.’
    • ‘Primary amides are prepared by reacting ammonia or amines with acid chlorides, anhydrides, or esters.’
    • ‘The reaction between the aldehyde and the organic amine or polyamine is usually conducted in the presence of an inert solvent.’
    • ‘The early coordination compounds prepared using ammonia were metal amines.’


Mid 19th century: from ammonia + -ine.