in use

The phrase "in use" describes something actively being employed for its intended function or purpose.

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Definition

B1General

(common)Currently being employed for its intended function.

Example

The conference room is currently in use.
This tool is in use by the maintenance team.

Similar

Terms that have similar or relatively close meanings to "in use":

use it make use in service used up in place in action used to free use in force in play get used in practice at work in business in effect in condition