momentously
In weighty fashion
In a way that has great importance or significance, suggesting something that will be remembered or have lasting consequences.
The adverb often carries a sense of weight or gravity: The president paused momentously before signing the treaty.
Sometimes used with light irony for events that aren't actually historic: She momentously announced she was switching to decaf.
Extremely significant or shocking
- transformativeCausing major change
- game-changingFundamentally altering outcomes
- pivotalVitally important, deciding
- groundbreakingIntroducing radical new ideas
monumental · far-reaching · consequential · profound · influential · powerful · dramatic · catalytic
Starting a new age
- era-definingShaping an entire period
- revolutionarySeeking fundamental systemic change
- landmarkNotable point of reference
- watershedDrainage area boundary
unprecedented · unforgettable · immortalized · commemorated · recorded · annals · posterity · historically
In serious manner
- seriouslyWith sincere intent
- solemnlyIn a serious manner
- heavilyWith great weight
- ponderouslyIn a heavy, slow way
substantially · portentously · gravitas · soberly · earnestly · weightily · importantly · significantly
earth-shattering
Extremely significant or shocking
- transformativeCausing major change
- game-changingFundamentally altering outcomes
- pivotalVitally important, deciding
groundbreaking · monumental · far-reaching · consequential · profound · influential · powerful · dramatic · catalytic · seminal
epoch-making
Starting a new age
- era-definingShaping an entire period
- revolutionarySeeking fundamental systemic change
- landmarkNotable point of reference
watershed · unprecedented · unforgettable · immortalized · commemorated · recorded · annals · posterity · historically · indelibly
gravely
In serious manner
ponderously · substantially · portentously · gravitas · soberly · earnestly · weightily · importantly · significantly · ceremoniously
momentouslyinsignificantly
In an unimportant manner
inconsequentially · trivially · unimportantly · negligibly · immaterially