Meaning

2 senses
  1. An archetypical humanoid alien, usually described as having grey skin, elongated, hairless, sexless features, and a large head with bulbous black eyes; chiefly associated with flying saucers, alien abductions and conspiracy theories relating to cover-ups by the United States government, such as Area 51.

  2. Used other than figuratively or idiomatically: see grey, alien.

Origin

From grey + alien.

From grey + alien.

Wiktionary, CC BY-SA 4.0 · source

Forms

plural: grey aliens

See also

neighbours in the dictionary
grey alien — meaning, examples, forms, synonyms | Krumeto