Pronunciation: /ˈeɪ.li.ən/
noun a being from another planet or world; extraterrestrial
A1 I saw an alien in a movie last night.
A2 The children believed they saw an alien in the backyard.
B1 Scientists are studying the possibility of alien life on other planets.
B2 The government denied any knowledge of alien spacecraft sightings.
C1 The novel explores the idea of alien cultures interacting with humans.
C2 The astronaut claimed to have encountered an alien being during the space mission.
adjective belonging to a foreign country or nation; unfamiliar and disturbing or distasteful
A1 The children were scared of the alien-looking toy.
A2 The new student felt like an alien in the unfamiliar school.
B1 The scientist discovered an alien species living on the distant planet.
B2 The government denied any knowledge of alien spacecraft sightings.
C1 The artist's work was so unique, it seemed almost alien to traditional art forms.
C2 The concept of time travel is often seen as alien to our current understanding of physics.
formal The scientist claimed to have discovered evidence of an alien presence on the distant planet.
informal I heard a rumor that there are aliens living among us.
slang Dude, do you believe in aliens and UFOs?
figurative Her ideas were so innovative, they seemed almost alien to the traditional way of thinking.
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