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In some senses, revolutionary is marked as informal. Watch for register when choosing this word.
ADJ.
all, communist, most, simple
The most revolutionary invention of the twentieth century was undoubtedly the internet.
VERB + REVOLUTIONARY
act, experiencing, fought, maintains, means, overthrown, seems, steps
The workers fought revolutionary changes to transform their workplace conditions.
REVOLUTIONARY + NOUN
agitators, council, coup, day, fervor, government, idea, ideas
The revolutionary council met in secret to plan the overthrow of the existing regime.
PREP.
after, in
The steam engine was revolutionary in transforming how factories operated during the Industrial Revolution.
ADV.
almost, truly
The invention of the smartphone was almost revolutionary in how it changed our daily lives.