1. search for extraterrestrial intelligence.

Origin of SETI

First recorded in 1975–80

Words Nearby SETI

Other definitions for seti- (2 of 2)


  1. a combining form meaning “bristle”; used in the formation of compound words: setiform.

Origin of seti-

<Latin sēti-, saeti-;see seta, -i- Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use SETI in a sentence

British Dictionary definitions for SETI


/ (ˈsɛtɪ) /

n acronym for
  1. Search for Extraterrestrial Intelligence; the attempt to detect signals, esp radiowaves or light, from an intelligent extraterrestrial source

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Cultural definitions for SETI


[ (set-ee) ]

A program devoted to the search for signals from other parts of the galaxy that would indicate the presence of advanced technological civilizations. Over the years, it has sometimes been funded by NASA, sometimes by private organizations.

Notes for SETI

SETI involves scanning radio waves for signals, but it has found none to date.

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.