Bilingual means involving or using two languages.
Bilingual education.
The collins bilingual dictionaries.
Able to use two languages equally well:
(of a group or place) using two languages as main.
Learn more.
Able to speak and understand two languages;
Using or expressed in two languages
In bilingual education, students are taught in two (or more) languages.
[1] it is distinct from learning a second language as a subject because both languages are used for instruction in.
Linguistics able to speak two languages, esp.
With native ability:
Bilingual in french and italian.
Linguistics expressed in, involving, or using two languages:
A bilingual dictionary.