- 1 harbor somebody to hide and protect someone who is hiding from the police Police believe someone must be harboring the killer.
- 2harbor something to keep feelings or thoughts, especially negative ones, in your mind for a long time The arsonist may harbor a grudge against the company. She began to harbor doubts about the decision. to harbor thoughts of revenge He still harbors ambitions of playing professional soccer.
- 3 harbor something to contain something and allow it to develop Your dishcloth can harbor many germs. These woodlands once harbored a colony of red deer.
NAmE//ˈhɑrbər//Verb Forms present simple I / you / we / they harbor ()harbour he / she / it harbors ()harbours past simple harbored ()harboured -ing form harboring ()harbouring