IPA: //ˈbaɪlɪŋɡwəl//
KK: /ˈbaɪlɪŋɡwəl/
Relating to or able to use two languages, often with similar skill in both.
She is bilingual and can speak both English and Spanish fluently.
A person who can speak and understand two languages well.
She is a bilingual who speaks both English and Spanish fluently.
Bilingual → It is formed from "bi-" (meaning two) and "lingua" (meaning tongue or language). The word "bilingual" refers to a person who can speak two languages.
Think of 'bi-' meaning two and 'lingua' meaning language — that's why bilingual means someone who speaks two languages.