line in
B2 neutral transitive
In simple words
The socket you plug a music player or microphone cable into to send sound into a computer or speaker system.
Literal meaning: A signal line coming in to a device — transparent in technical context.
Meanings
1 B2 neutral
To connect an external audio source to a device via the line input socket.
"Make sure you line in your guitar through the interface before recording."
Grammar: separable
Usage notes
Used as both a noun ('the line in socket') and occasionally as a verb phrase ('line in the signal'). Primarily a technical term in audio engineering and consumer electronics. Contrast with 'line out'. Not a traditional phrasal verb in the grammatical sense but included for learner reference.
Commonly used with
socket jack port cable signal audio microphone
Forms
Base
line in
I/you/we/they
3rd person
lines in
he/she/it
Past simple
lined in
yesterday
Past participle
lined in
have + pp
-ing form
lining in
continuous
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Synonyms
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