phase something out Definition

phase
noun

1. A stage or period in growth or development.

Thesaurus: stage, point, juncture, period, step, time, season, chapter.
2. The appearance or aspect of anything at any stage.
3. astron.
Any of the different shapes assumed by the illuminated surface of a celestial body, eg the Moon.
4. physics.
The stage that a periodically varying waveform has reached at a specific moment, usually in relation to another waveform of the same frequency.
5. chem.
A homogeneous part of a chemical system that is separated from other such parts of the system by distinct boundaries.
Example: Ice and water form a two-phase mixture

verb

phased, phasing
1. To organize or carry out (changes, etc) in stages.

Idiom: in phase (out of phase)

Coinciding, or failing to coincide, phase by phase throughout a series of changes.

Etymology: 19c: from Greek phasis appearance.

Phrasal Verb: phase something in or out

To introduce it, or get rid of it, gradually and in stages. See also phase-out.