On — Meaning, Definition & Synonyms

preposition adverb adjective abbreviation /ˈȯn/

Meaning & Definition of On

On (preposition)

  1. —used as a function word to indicate position in contact with and supported by the top surface of
  2. —used as a function word to indicate position in or in contact with an outer surface
  3. —used as a function word to indicate position in close proximity with

On (adverb)

  1. in or into a position of contact with an upper surface especially so as to be positioned for use or operation
  2. in or into a position of being attached to or covering a surface; especially, in or into the condition of being worn
  3. forward or at a more advanced point in space or time

On (adjective)

  1. engaged in an activity or function (such as a dramatic role)
  2. being in operation
  3. placed so as to permit operation

On (abbreviation)

  1. Ontario

On (preposition) — Senses, Synonyms & Antonyms

  1. having to do with

    "books on sports heroes are my favorite reading matter"

    related: over
  2. in or into contact with

    "don't lean on that ladder—you'll knock it over"

    similar: against, upon

On (adverb) — Senses, Synonyms & Antonyms

  1. toward a point ahead in space or time

    "we really must move on now if we're going to end this meeting before midnight"

    near: backward
  2. toward or at a point lying in advance in space or time

    "he's getting on in years and doesn't see or hear as well as he used to"

    related: before, fore, frontward

On (adjective) — Senses, Synonyms & Antonyms

  1. being in effective operation

    "please don't leave the sanding machine on if you're not going to be near it"

Related Entry: On-and-off (adjective)

On-and-off is a different word from On. The synonyms below are for on-and-off, not for on.

  1. occurring or appearing at intervals

    "an on-and-off friendship over the years"

Related Entry: On-target (adjective)

On-target is a different word from On. The synonyms below are for on-target, not for on.

  1. being in agreement with the truth or a fact or a standard

    "an economic forecast for three percent growth that turned out to be entirely on-target"

Related Entry: On and off (adverb)

On and off is a different word from On. The synonyms below are for on and off, not for on.

  1. not constantly or steadily over a period of time

    "It's been raining on and off all afternoon."

Related Entry: On a dime (phrase)

On a dime is a different word from On. The synonyms below are for on a dime, not for on.

  1. without delay

    "Now that I got my brakes fixed my car stops on a dime."

Related Entry: On account of (phrase)

On account of is a different word from On. The synonyms below are for on account of, not for on.

  1. as the result of

    "She was barred from the establishment on account of her misconduct."

Related Entry: On all hands (phrase)

On all hands is a different word from On. The synonyms below are for on all hands, not for on.

  1. in every place or in all places

    "They agreed on all hands that a fresh start would be best for the company."

    opposite: nowhere

Related Entry: On an even keel (phrase)

On an even keel is a different word from On. The synonyms below are for on an even keel, not for on.

  1. not undergoing a change in condition

    "She's kept her credit score on an even keel so she hopes to be able to buy a car soon."

Synonyms, Thesaurus & Another Word for On

The most common words with a similar meaning to On:

Antonyms & Opposite Words for On

Words with the opposite meaning of On:

Near Antonyms of On

Origin & Etymology of On

Middle English an, on, preposition & adverb, from Old English; akin to Old High German ana on, Greek ana up, on

First known use: before 12th century

Vocabulary Lists & Topics for On

Words & Phrases Containing On

Frequently Asked Questions about On

What does "On" mean?

"On" means —used as a function word to indicate position in contact with and supported by the top surface of. As an a preposition, an adverb, an adjective and an abbreviation, it is defined as: —used as a function word to indicate position in contact with and supported by the top surface of. It has 5 distinct senses.

What is another word for "On"?

Other words for "On" include about, apropos, apropos of, as far as, as for, as regards, as to and concerning. The best synonym depends on which meaning of "On" you intend.

What are different ways to say "On"?

There are 71 words and phrases with a similar meaning to "On". Common alternatives include about, apropos, apropos of, as far as, as for, as regards, as to, concerning, of and regarding.

What is the opposite of "On"?

Antonyms of "On" include broken, dead, inactive, inoperative, kaput, nonactivated, nonfunctional and nonfunctioning. Near antonyms include backward, back, behind and rearward.

How do you use "On" in a sentence?

Examples of "On" in a sentence: "books on sports heroes are my favorite reading matter"; "don't lean on that ladder—you'll knock it over"; "we really must move on now if we're going to end this meeting before midnight".

Is "On" a noun, verb, or adjective?

"On" can be used as a preposition, an adverb, an adjective and an abbreviation, depending on the context.

Is "On" useful for IELTS, TOEFL, and other English exams?

As an A1-level word, "On" is typical of Cambridge A1 Movers (Young Learners), TOEIC Listening & Reading 120+.

How do you pronounce "On"?

"On" is pronounced /ˈȯn/.