Amines are organic compounds that can be considered as derivatives of ammonia (NH3), where one or more hydrogen atoms have been substituted by an alkyl or aryl group. When the substituent is an alkyl group, they are referred to as alkylamines, whereas when the substituent is an aryl group, they are known as arylamines. Amines that have both alkyl and aryl groups attached to the same nitrogen atom are commonly called alkylarylamines.

Amines are organic compounds or functional groups that possess a nitrogen atom with a lone pair, which imparts them with basic properties in chemistry.

An organic compound containing multiple amino groups is referred to as a diamine if it has two amino groups, a triamine if it has three amino groups, a tetraamine if it has four amino groups, and so on.

Numerous neurotransmitters belong to the class of amines, encompassing epinephrine, norepinephrine, dopamine, serotonin, and histamine, among others.