verb, particle, punctuation, noun · to add, increase, or augment; (mathematics) plus

一加一等于二。

adverb, verb · used before a disyllabic verb to indicate that the action applies to something previously mentioned

请对该计划稍加改良。

abbreviation · abbreviation for Canada (加拿大 Jiā​ná​dà)

加中两国在很多领域都有合作。

proper name · Chinese surname Jia

加先生是我的邻居。