'EST' definitions:

Definition of 'EST'

(from WordNet)
noun
Standard time in the 5th time zone west of Greenwich, reckoned at the 75th meridian; used in the eastern United States [syn: Eastern Time, Eastern Standard Time, EST]

Definition of 'Est'

From: GCIDE
  • Est \Est\, n. & adv. East. [Obs.] --Chaucer. [1913 Webster]

Acronyms for 'est'

From: V.E.R.A.
  • Eastern Standard Time [-0500] (TZ, EDT, USA)