Dictionary.com

planetary

[ plan-i-ter-ee ]
/ ˈplæn ɪˌtɛr i /
Save This Word!

adjective
of, relating to, or resembling a planet or the planets.
wandering; erratic.
terrestrial; global.
Machinery. noting or pertaining to an epicyclic gear train in which a sun gear is linked to one or more planet gears also engaging with an encircling ring gear.
noun
Machinery. a planetary gear train.
QUIZ
ARE YOU A TRUE BLUE CHAMPION OF THESE "BLUE" SYNONYMS?
We could talk until we're blue in the face about this quiz on words for the color "blue," but we think you should take the quiz and find out if you're a whiz at these colorful terms.
Question 1 of 8
Which of the following words describes “sky blue”?
Meet Grammar CoachWrite or paste your essay, email, or story into Grammar Coach and get grammar helpImprove Your Writing
Meet Grammar CoachImprove Your Writing
Write or paste your essay, email, or story into Grammar Coach and get grammar help

Origin of planetary

From theLatin word planētārius, dating back to 1585–95. See planet, -ary

OTHER WORDS FROM planetary

non·plan·e·tar·y, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use planetary in a sentence

British Dictionary definitions for planetary

planetary
/ (ˈplænɪtərɪ, -trɪ) /

adjective
noun plural -taries
a train of planetary gears
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
FEEDBACK