In science:

• Ambient noise level
• Ambient temperature

In mathematics:

• Ambient space

In computing:

• Ambient calculus
• Ambient desktop

In music:

• Ambient music
• Ambient series a set of four albums produced/recorded by Brian Eno
• Virgin Ambient series, by Virgin Records
• Ambient (album), by the artist Moby

In advertising:

• Ambient media

In visual arts:

• Ambient light

Companies:

• Ambient Devices, a U.S. company