1. unilingual - Noun
2. unilingual - Adjective
unilingual (not comparable)
knowing or using a single language
Synonym: monolingual
Antonyms: multilingual, plurilingual
unilingual (plural unilinguals)
a person who understands only one language
Of course a bilingual state is more expensive than a unilingual one - but it is a richer state. Pierre Trudeau
When Trudeau came up with the idea of a unilingual Joual-speaking province of Canada, he stated that only Kebek had that right, to be unilingual. Source: Internet