Phrase guide

phase in

verb · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

verb

Meaning 1

To introduce (something) little by little, either via discrete phases of increase or (by extension) by continuous gradations; to introduce in phases, or as if by phases (gradually); to begin (something) gradually.

Definition source: English Wiktionary via Wiktextract

Usage: transitive

Examples

  • The government will phase in the new education system over a period of three years.
  • The program phased in last year.

Meaning relationships

Synonyms: none provided

Antonyms: phase out

2

verb

Meaning 2

introduce gradually

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: phase out

Broader terms: introduce, innovate

History

Etymology

No etymology was provided for this word.