1 B2 idiomatic informal
To inform someone about something they did not know, bringing them up to date.
"Nobody told me about the change in plan — can someone clue me in?"
separable
clue in
B2 informal separable transitive
To tell someone something they did not know, especially information that helps them understand a situation.
In plain English
To tell someone something important so they understand what is happening.
What does "clue in" mean?
2 meanings, ordered from most common to least. Color-coded by CEFR level.
2 B2 idiomatic informal
To reveal a secret or hidden detail to someone so they can understand the full picture.
"She finally clued him in on the surprise party they had been planning for weeks."
separable
Literal vs figurative
Words literally mean
To give someone a clue ('clue') that brings them in ('in') to understanding.
Actually means
To tell someone something important so they understand what is happening.
Usage tip
Common in American informal English. Often used in the construction 'clue someone in on something.' Implies the person being informed was previously unaware or left out. Slightly less common in British English.
Words that pair with "clue in"
Natural word combinations native speakers use most often.
plan secret situation details news what's happening
How to conjugate "clue in"
The five tense forms you'll use most often.
Base
clue in
I/you/we/they
3rd person
clues in
he/she/it
Past simple
clued in
yesterday
Past participle
clued in
have + pp
-ing form
cluing in
continuous
Hear "clue in" in the wild
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