What does ambient mean?
The definition of ambient
Am”bi*ent, a.
Etym: [L. ambiens, p. pr. of ambire to go around; amb- + ire to go.]

Encompassing on all sides; circumfused; investing. “Ambient air.” Milton. “Ambient clouds.” Pope.

Am”bi*ent, n.
Something that surrounds or invests; as, air . . . being a perpetual ambient. Sir H. Wotton.