The difference between Avant-garde and Underground
When used as nouns, avant-garde means the vanguard of an army or other force, whereas underground means an underground railway.
When used as adjectives, avant-garde means innovative, pioneering, especially when extremely or obviously so, whereas underground means below the ground.
Underground is also adverb with the meaning: below the ground.
Underground is also verb with the meaning: to route electricity distribution cables underground.
check bellow for the other definitions of Avant-garde and Underground
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Avant-garde as a noun (obsolete):
The vanguard of an army or other force.
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Avant-garde as a noun:
Any group of people who invent or promote new techniques or concepts, especially in the arts.
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Avant-garde as an adjective:
Innovative, pioneering, especially when extremely or obviously so.
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Underground as an adjective (not comparable):
Below the ground; below the surface of the Earth.
Examples:
"synonyms: subterranean"
"There is an underground tunnel that takes you across the river."
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Underground as an adjective:
Hidden, furtive, secretive.
Examples:
"synonyms: clandestine hiddhush-hush secret"
"These criminals operate through an underground network."
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Underground as an adjective:
Of music, art, etc, outside the mainstream.
Examples:
"synonyms: unconventional"
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Underground as an adverb:
Below the ground.
Examples:
"synonyms: [[below]] [[ground]]"
"The tunnel goes underground at this point."
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Underground as an adverb:
Secretly.
Examples:
"synonyms: clandestinely in secret on the quiet"
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Underground as a noun (chiefly, British):
An underground railway.
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Underground as a noun (with "the"):
A movement or organisation of people who resist political convention.
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Underground as a noun (with "the"):
A movement or organisation of people who resist artistic convention.
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Underground as a verb:
To route electricity distribution cables underground