The Collaborative International Dictionary
Phase out
Phase out \Phase" out`\ (f[=a]z" out`), v. t. To halt (an activity) in steps, or gradually; as, to phase out use of 386-based PC's.
Wiktionary
phase out
vb. (context idiomatic English) To remove or relinquish the use of something little by little
WordNet
phase out
v. terminate gradually [ant: phase in]
Usage examples of "phase out".
With good luck, they would eventually phase out their own clunky spy devices.
He needed a way to phase out his sermon, and snatched at what seemed handiest.
They came from all over the galaxy, at null-speeds, as fast as the messenger ships could get there, phase in, broadcast the alarm,and phase out for the next destination.