Question 1

What does "room in" mean?

Accepted Answer

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

Question 2

How do you use "room in" in a sentence?

Accepted Answer

The hospital encourages rooming in because it helps establish breastfeeding.

Question 3

Is "room in" formal or informal?

Accepted Answer

"room in" is register-neutral — appropriate in both casual and formal contexts. 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.

room in

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