ON

Abbreviation with 2 meanings

ON
Stands forOntario
Meanings2
CategoriesGeography & Places, Writing & Everyday

ON has two meanings. It stands for Ontario (Canadian province and territory) or Old Norse (grammar and dictionary).

Meanings of ON at a glance

#ON stands forContext
1OntarioGeography & Places › Canadian Province and Territory
2Old NorseWriting & Everyday › Grammar and Dictionary

1. Ontario

Geography & Places · Canadian Province and Territory Abbreviations

Canada's most populous province, with more than 15 million people, home to both Toronto, the provincial capital and largest city, and Ottawa, the national capital. Ontario borders four of the five Great Lakes, and its postal codes begin with K, L, M, N or P.

Example: Mail the tax slip to Canada Revenue Agency, Sudbury ON P3A 5C1.

The traditional abbreviation is Ont., as in KINGSTON, Ont. ON is also the ordinary word on, so software that parses addresses must use context. Toronto postal codes all begin with M.

2. Old Norse

Writing & Everyday · Grammar and Dictionary Abbreviations

Labels Old Norse, the North Germanic language of the Viking Age, as the source of English words introduced through Scandinavian settlement in England from the 9th century.

Example: sky (n.) from ON ský "cloud," a sense that shifted to "the heavens" in Middle English

Old Norse gave English everyday words such as "they," "egg," "knife," "skin," "window" and "law." Many sk- words, including "skirt," reveal Norse origin, while their native English cousins have sh- ("shirt"). Modern Icelandic is the closest living relative of Old Norse.

More Canadian province and territory abbreviations

  • NS – Nova Scotia
  • NT – Northwest Territories
  • NU – Nunavut
  • NWT – Northwest Territories
  • Ont. – Ontario
  • PE – Prince Edward Island
  • PEI – Prince Edward Island
  • PQ – Province of Quebec

See all 26 Canadian province and territory abbreviations →

More grammar and dictionary abbreviations

  • occas. – Occasionally
  • OE – Old English
  • OED – Oxford English Dictionary
  • OF – Old French
  • orig. – Originally
  • part. – Participle
  • pass. – Passive
  • PIE – Proto-Indo-European

See all 93 grammar and dictionary abbreviations →