noun. ['ˈtriːˌoʊ'] a musical composition for three performers.
noun. ['ˈtriːˌoʊ'] the cardinal number that is the sum of one and one and one.
noun. ['ˈtriːˌoʊ'] three people considered as a unit.
noun. ['ˈtriːˌoʊ'] a set of three similar things considered as a unit.
noun. ['ˈtriːˌoʊ'] three performers or singers who perform together.