on
preposition
[ ɒn ]
• physically in contact with and supported by (a surface).
• "on the table was a water jug"
• forming a distinctive or marked part of the surface of.
• "a scratch on her arm"
• having (the thing mentioned) as a topic; about.
• "a book on careers"
• as a member of (a committee, jury, or other body).
• "they would be allowed to serve on committees"
• having (the thing mentioned) as a target, aim, or focus.
• "five air raids on Schweinfurt"
• (often followed by a noun without a determiner) having (the thing mentioned) as a medium for transmitting or storing information.
• "put your ideas down on paper"
• in the course of (a journey).
• "he was on his way to see his mother"
• indicating the day or part of a day during which an event takes place.
• "reported on September 26"
• engaged in.
• "his attendant was out on errands"
• regularly taking (a drug or medicine).
• "he is on morphine to relieve the pain"
• paid for by.
• "the drinks are on me"
• added to.
• "a few pence on the electricity bill is nothing compared with your security"
on
adverb
• physically in contact with and supported by a surface.
• "make sure the lid is on"
• indicating continuation of a movement or action.
• "she burbled on"
• (of an event) taking place or being presented.
• "what's on at the May Festival"
• (of an electrical appliance or power supply) functioning.
• "they always left the lights on"
Similar:
functioning,
in operation,
working,
in use,
operating,
• (of a performer) on stage.
on
noun
• the leg side.
Origin:
Old English on, an, of Germanic origin; related to Dutch aan and German an, from an Indo-European root shared by Greek ana .
-on
suffix
• forming nouns denoting subatomic particles or quanta.
• "neutron"
• forming nouns denoting molecular units.
• "codon"
• forming nouns denoting substances.
• "interferon"
Origin:
-on (sense 1) originally in electron, from ion, influenced (as in -on (sense 2)) by Greek on ‘being’; -on (sense 3) is on the pattern of words such as cotton or from German -on .
ON
abbreviation
• Ontario (in official postal use).
ON
abbreviation
• Old Norse.
