1kind and pleasant:they were friendly to meshe gave me a friendly smile
[predic.] (of a person) on good or affectionate terms:I was friendly with one of the local farmers
(of relations) not in conflict:we want friendly relations with all countries
not seriously competitive or divisive:friendly rivalry between the two schools
British (of a game or match) not forming part of a serious competition.
2 [in combination] denoting something that is adapted for or is not harmful to a specified thing:an environment-friendly agronomic practicechild-friendly policies
3favourable or serviceable:no one noticed her as she slipped out—it was a friendly night
4 Military (of troops or equipment) of, belonging to, or allied with one’s own forces:the risk of blowing up friendly forces is minimized
noun (plural friendlies)
British
a game or match that does not form part of a serious competition:England will play two friendlies in Sardinia
Derivatives
friendlily
adverb
friendly in other Oxford dictionaries
Definition of friendly in the US English dictionary