[ jem-uh-nahy, -nee ]
/ ˈdʒɛm əˌnaɪ, -ni /

plural noun, genitive Gem·i·no·rum [jem-uh-nawr-uh m, -nohr-] /ˌdʒɛm əˈnɔr əm, -ˈnoʊr-/ for 1.

Astronomy. the Twins, a zodiacal constellation between Taurus and Cancer containing the bright stars Castor and Pollux.
  1. the third sign of the zodiac: the mutable air sign.
  2. a person born under this sign, usually between May 21st and June 20th.
a two-person U.S. spacecraft designed for orbital rendezvous and docking: used in 1965–66 in various experiments preparatory to a landing on the moon.

Origin of Gemini

1350–1400; Middle English < Latin geminī, plural of geminus Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for gemini

British Dictionary definitions for gemini


/ (ˈdʒɛmɪˌnaɪ, -ˌniː) /

noun Latin genitive Geminorum (ˌdʒɛmɪˈnɔːrəm)

astronomy a zodiacal constellation in the N hemisphere lying between Taurus and Cancer on the ecliptic and containing the stars Castor and Pollux
classical myth another name for Castor and Pollux
astronautics any of a series of manned US spacecraft launched between the Mercury and Apollo projects to improve orbital rendezvous and docking techniques
  1. Also called: the Twins the third sign of the zodiac, symbol ♊, having a mutable air classification and ruled by the planet Mercury. The sun is in this sign between about May 21 and June 20
  2. a person born when the sun is in this sign


astrology born under or characteristic of Gemini
Also (for senses 4b, 5): Geminian (ˌdʒɛmɪˈnaɪən)
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

Science definitions for gemini


[ jĕmə-nī′ ]

A constellation in the Northern Hemisphere near Cancer and Auriga. Gemini (the Twins) contains the bright stars Pollux and Castor and is the third sign of the zodiac.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.