Definitions

1. noun

A particular stage or period in a process or development; a stage or part of a project or activity

“The new product will go through several phases of testing before it’s released to the public.”

2. verb

To change from one phase to another, especially in a process or development

“The company will phase out its old products to make room for new ones.”

3. noun

A field or area of a subject, especially physics, characterized by a particular frequency range

“The radio station broadcasts music in the AM phase.”

4. noun

A part of a celestial body’s orbit, especially in the moon’s orbit around the earth

“The phase of the moon affects the tides.”