Prices 2019 - Est Acronyme, What does est stand for? - all acronyms, 485 meanings of est acronym and est abbreviation. get the definition of est by all acronyms dictionary. top definition: eastern standard time. Est – eastern standard time (time zone abbreviation), Eastern standard time (est) is 5 hours behind coordinated universal time (utc). this time zone is in use during standard time in: north america, caribbean, central america. this time zone is often called eastern time zone. see full time zone map.. What does est stand for? - abbreviations.com, Looking for the definition of est? find out what is the full meaning of est on abbreviations! 'estimated' is one option -- get in to view more @ the web's largest and most authoritative acronyms and abbreviations resource..