in use

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in use

The telephone is in use.

Definition
  1. Adjective:
    • Currently being used or operated: Describes something that is actively employed or functioning at the present time.
    • (Of a facility or service) Occupied and therefore unavailable: Indicates that a shared resource, such as a telephone line, restroom, or meeting room, is currently occupied by someone and not free for others to use.
Usage
  • The phrase "in use" functions as an adjective and typically follows a linking verb like "is," "are," "was," or "were." It describes the state of the subject.
  • It is commonly used in formal, technical, and everyday contexts to indicate active operation or occupancy.
Examples
  • Adjective:
    • The laboratory equipment is currently in use for an important experiment.
    • All the conference rooms are in use until 3 PM.
    • Please wait; the restroom is in use.
    • Traditional farming methods are still in use in many parts of the country.
Advanced Usage
  • "to be in use": The standard phrase to indicate something is being utilized.
    • The old factory is no longer in use.
  • "to come into use": To begin to be used or adopted.
    • Electric cars are coming into use more widely.
  • "to go out of use": To become obsolete or no longer used.
    • That type of machinery went out of use decades ago.
Variants and Related Words
  • In-use (adj): Often hyphenated when used attributively before a noun.
    • The in-use software license must be renewed.
  • Usage (n): The act or manner of using something; the state of being used.
    • The usage of plastic has decreased.
  • Usable (adj): Able to be used.
    • The device is old but still usable.
Synonyms
  • Occupied: (For facilities) Being used by someone.
  • Engaged: (Chiefly British) In use, especially of a telephone line.
  • Operational: Functioning and in active service.
  • Active: Currently functioning or in operation.
Antonyms
  • Available: Free to be used.
  • Unoccupied: Not being used.
  • Idle: Not active or in use.
  • Out of service: Not functioning or available for use.
Related Phrases
  • In operation: Functioning or working.
    • The new system is now in operation.
  • Out of order: Not working; broken.
    • The elevator is out of order.
in use

The telephone is in use.

Adjective
  1. currently being used
    • robots are in use throughout industry
  2. (of facilities such as telephones or lavatories) unavailable for use by anyone else or indicating unavailability; (`engaged' is a British term for a busy telephone line)
    • her line is busy
    • receptionists' telephones are always engaged
    • the lavatory is in use
    • kept getting a busy signal

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