1 adjective involving two peopleduine le duine c m uone-to-one tuitionteagasc duine le duine2 adjective MATH, SCI of mathematical relationshipaon le haon3 noun EMPL meeting of two peoplecruinniú duine le duine4 adverb with only two presentduine ar dhuineduine le duine c m uyou can talk to a counsellor one-to-oneféadfaidh tú labhairt le comhairleoir i d'aonar, féadfaidh tú labhairt duine ar dhuine le comhairleoir