Definition of "mattress" in English

noun

1. A pad on which a person can recline and sleep, usually having an inner section of coiled springs covered with foam or other cushioning material then enclosed with cloth fabric.

2. A form of retaining wall used to support foundations or an embankment

3. A form of lagging, in particular for boilers.

verb

1. (transitive) To cover with a thick layer, like a mattress; to blanket.