Definition

Verb (transitive) To introduce, implement, or incorporate something gradually over a period of time, rather than all at once.

Usage

The verb "phase in" is used to describe the controlled, step-by-step introduction of a new system, rule, product, or change. It implies a planned transition to minimize disruption. It is often used in business, government, technology, and policy contexts. The direct object (the thing being introduced) follows the phrasal verb.

Examples

• The government will phase in the new tax regulations over the next three years.
• The software company plans to phase in the updated features for all users by the end of the quarter.
• To reduce shock to the economy, the reforms were phased in slowly.
• The school is phasing in a new curriculum starting with the youngest grades.

Advanced Usage

• Passive Voice: Commonly used to emphasize the process rather than the actor.
  • A four-day workweek is being phased in at several companies.
• Noun Form ("phase-in"): The act or process of phasing something in.
  • The phase-in of the new security measures will take six months.

Variants and Related Words

• Phase (verb): To plan or carry out something in stages.
  • The project is phased into four distinct parts.
• Phase out (phrasal verb): The opposite action; to remove or discontinue something gradually.
  • The old model will be phased out as the new one is phased in.

Synonyms

• Introduce gradually
• Implement in stages
• Roll out (often implies a phased introduction)
• Incorporate progressively

Antonyms

• Introduce abruptly
• Implement immediately
• Impose suddenly

Verb

1. introduce gradually