best friend
Proposed by a contributor, not yet supported by evidence.
Meaning · English
a person's closest and most trusted friend
Literally: most close friend
Register: neutral
Examples
My best friend isn't Thai.Bạn thân của tôi không phải là người Thái.
My best friend is so clever, she always gets good score on her exams.Bạn thân của tôi rất thông minh, cô ấy luôn đạt điểm cao trong các kỳ thi của mình.
Tatoeba sentence #7653835 (CC BY 2.0 FR, tatoeba.org, retrieved 2026-07-31)
Sources & notes
Everyday learner phrase (CEFR A1); level cross-referenced from published learner lists. Definition pending editorial review. Definition drafted by AI (@cf/meta/llama-3.3-70b-instruct-fp8-fast) and auto-approved by rule on 2026-08-01; pending editor spot-check.
Common questions
What does “best friend” mean?
a person's closest and most trusted friend Literally: most close friend
Is “best friend” formal or informal?
best friend is generally neutral.