efflux

US: (ef′luks)

WordReference Random House Unabridged Dictionary of American English © 2026

ef•flux  (ef′luks), n. 

1. outward flow, as of water.
2. something that flows out; effluence.
3. a passing or lapse of time.

a passing away;
expiration;
ending. Also, ef•flux•ion  (i fluk′shən) (for defs. 3, 4).

• Medieval Latin effluxus, equivalent. to Latin ef- ef- + fluc-, variant stem of fluere to flow + -sus, for -tus suffix of verb, verbal action
• 1635–45

WordReference Random House Unabridged Dictionary of American English © 2026

ef•flu•ence  (ef′lo̅o̅ əns), n. 

1. the action or process of flowing out;
   efflux.
2. something that flows out;
   emanation.

• Latin efflu- outflow (ef- ef- + flu- flow) + -ence
• 1595–1605

Collins Concise English Dictionary © HarperCollins Publishers::

effluence / ˈɛflʊəns/, efflux / ˈɛflʌks/ noun

1. the act or process of flowing out
2. something that flows out