epoch-making
adjective
uk/ˈiː.pɒkˌmeɪ.kɪŋ/us/ˈiː.pɑːkˌmeɪ.kɪŋ/An epoch-makingeventis veryimportantbecause it has agreateffecton aparticulartimeperiod:
Darwin's epoch-makingwork"On The Origin Of Species"receivedamixedreactionat first.
Any epoch-makingeventtoday wouldinvolvecrowdsrecordingit ontheirmobilephones.
Synonym
epochal
- In the 20thcentury,Scotlandfinallygotitsownparliament, an epoch-makingevent.
 - Everyscientistwould like toaccomplishsuch an epoch-makingadvance.
 - Theytreatedherideaswithcontempt,cuttingshortwhat might have been an epoch-makingscientificcareer.
 - In 2004, something epoch-makinghappened: for the firsttimeinhumanhistorythemajorityof the world'spopulationwerelivingincities.
 - Alexander theGreatis one of the fewindividualsinhistorywholiterallywas epoch-making.
 
Very important or urgent
- all-important
 - at all cost(s)idiom
 - be a matter of life and/or deathidiom
 - chief
 - clutch
 - co-principal
 - life-changing
 - mainly
 - major league
 - make the world go around/roundidiom
 - marmoreal
 - meaningful
 - pressing
 - prominent
 - radical
 - revalorization
 - revalorize
 - sacred
 - salient
 - subtle