1.SymbolISO 639-2 & ISO 639-3 language code for Estonian.
2.NounGrace; favour.
3.AdjectiveAbbreviation of established.
"Acme Manufacturing Inc., est 1952"
4.Proper nounInitialism of Erhard Seminars Training, a course intended to promote satisfaction with life in the present moment, as opposed to strivings to attain it.