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Idioms about on

Origin of on

before 900; Middle English on, an,Old English: on, in, to; cognate with Dutch aan,German an,Old Norse ā,Gothic ana; akin to Greek aná up, upon (see ana-)

WORDS THAT MAY BE CONFUSED WITH on

on , on to , onto

Other definitions for on (2 of 5)

On
[ on ]
/ ɒn /

noun
Biblical name of Heliopolis.

Other definitions for on (3 of 5)

ON

abbreviation
Old Norse. Also ON., O.N.
Ontario, Canada (approved for postal use).

Other definitions for on (4 of 5)

-on1

a suffix used in the names of subatomic particles (gluon; meson; neutron), quanta (graviton), and other minimal entities or components (cistron; codon; magneton; photon).

Origin of -on

1
Probably extracted from ion; cf. proton

Other definitions for on (5 of 5)

-on2

a suffix used in the naming of inert gaseous elements: neon.

Origin of -on

2
≪ Greek -on, neuter of -os adj. ending
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use on in a sentence

British Dictionary definitions for on (1 of 4)

Word Origin for on

Old English an, on; related to Old Saxon an, Old High German, Gothic ana

British Dictionary definitions for on (2 of 4)

On
/ (ɒn) /

noun
the ancient Egyptian and biblical name for Heliopolis

British Dictionary definitions for on (3 of 4)

ON

abbreviation for
Old Norse
(esp in postal addresses) Ontario

British Dictionary definitions for on (4 of 4)

-on

suffix forming nouns
indicating a chemical substanceinterferon; parathion
(in physics) indicating an elementary particle or quantumelectron; photon
(in chemistry) indicating an inert gasneon; radon
(in biochemistry) a molecular unitcodon; operon

Word Origin for -on

from ion
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

Medical definitions for on (1 of 3)

-on 22

suff.
Inert gas:radon.

Medical definitions for on (2 of 3)

-on 11

suff.
A subatomic particle:neutron.
A unit:photon.
A basic hereditary unit:codon.

Medical definitions for on (3 of 3)

-on 33

suff.
A chemical compound that is not a ketone or a compound that contains oxygen in a carbonyl group:parathion.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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