disloyal
adjective
UK/ˌdɪsˈlɔɪ.əl/
US/ˌdɪsˈlɔɪ.əl/
Definitions of disloyal adjective
- C2
Not faithful or supportive to someone or something that one is expected to be loyal to.
Revealing company secrets is an act of disloyal behavior towards colleagues.
He was accused of being disloyal to his teammates during the competition.
She considered it disloyal of her friend to criticize her behind her back.