thin air

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Definitions from WordNet

Noun thin air has 1 sense

thin air - nowhere to be found in a giant void; "it vanished into thin air"
--₁ is a kind of nothingness, void, nullity

Definitions from the Web

Thin Air

Description:

Thin air refers to the atmosphere at high altitudes or a situation where something appears to vanish abruptly as if it never existed.

Senses:

Sense 1:

Part of Speech: Noun

Meaning: The atmosphere at high altitudes where air pressure is low.

Example: Climbers require oxygen tanks when they ascend into thin air.

Related Products: Altitude Training Mask

Sense 2:

Part of Speech: Noun

Meaning: A situation where something or someone disappears suddenly and without a trace.

Example: The thief vanished into thin air, leaving no clues behind.

Sense 3:

Part of speech: Adjective

Meaning: Used to describe something that is almost non-existent or extremely scarce.

Example: The suspect's alibi held no weight and seemed to be made out of thin air.

Sense 4:

Part of speech: Adverb

Meaning: Used to describe an action that occurs suddenly or without any apparent cause.

Example: The magician made the rabbit disappear into thin air.