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room in

B2 neutral separable transitive
In simple words

To let someone stay and sleep in your room or home, OR (for hospitals) to keep a baby in the same room as its mother.

Literal meaning: To bring someone into a room — mostly transparent.

Meanings

1 C1 neutral

(Medical/maternity) To keep a newborn baby in the same hospital room as the mother, rather than in a separate nursery.

"The hospital encourages rooming in because it helps establish breastfeeding."

2 B2 informal

To accommodate someone by sharing one's room or living space with them.

"They roomed in together during the first year of university to save on costs."

Usage notes

In a medical context, 'rooming in' is a standard practice in maternity care where the newborn stays in the mother's hospital room rather than a separate nursery. This is the most institutionally recognised use. The general lodging sense is less common but used informally.

Commonly used with

baby newborn mother lodger student guest hospital

Forms

Base
room in
I/you/we/they
3rd person
rooms in
he/she/it
Past simple
roomed in
yesterday
Past participle
roomed in
have + pp
-ing form
rooming in
continuous

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