let in

In real, traceable use. Part of the curated seed collection; community review is coming.

Sense 1

Meaning · English

To let someone or something come in; to admit someone or something in.

Nghĩa · Tiếng Việt

Để ai hoặc cái gì vào; cho phép ai hoặc cái gì vào

Machine-translated — suggest a fix

Where it’s used: Used American English

Examples

He opened the window to let in the air.

Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).

Sense 2

Meaning · English

To let someone or something come in; to admit someone or something in. — To divulge one's inner thoughts to (someone), making oneself emotionally vulnerable to them; to open up to (someone).

Nghĩa · Tiếng Việt

Để ai hoặc cái gì vào; cho phép ai hoặc cái gì vào — Để lộ suy nghĩ nội tâm với (ai đó), làm cho mình dễ bị tổn thương về mặt cảm xúc với họ

Machine-translated — suggest a fix

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).

Sense 3

Meaning · English

To associate with.

Nghĩa · Tiếng Việt

Hòa nhập với

Machine-translated — suggest a fix

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).

Common questions

What does “let in” mean?

To let someone or something come in; to admit someone or something in.

Is “let in” formal or informal?

No register label has been reviewed yet — treat it as neutral and check the usage notes above.