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online

Definition, pronunciation, etymology, and usage for the English word. Free spelling reference powered by Wiktionary.

Letters

6 characters

Language

English

word origin

Source

Wiktionary

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Detailed reference entry for the English word "online", 6-letters, with pronunciation in International Phonetic Alphabet notation, etymology traced through Germanic and Romance roots where applicable, common misspelling variants catalogued from Hunspell error dictionaries, and usage frequency ranked against the top 100,000 English words in the Wordfreq corpus. PlainSpell covers English, Spanish, Portuguese, French, and German spelling with confusable-pair detection that highlights visually and phonetically similar words. This entry for "online" includes synonyms, antonyms, homophones, and cross-language translation pointers sourced from Wiktionary via the kaikki.org extract. Whether you are verifying the correct spelling of "online" for academic writing, checking homophone confusion, or exploring etymological origins, this page provides a citation-backed, free reference that requires no sign-up.

online is anEnglishadj. It means: Of a system: connected (generally electrically) to a larger network. Pronounced /ˈɒnlaɪn/. It ranks #659 in English word frequency. Often confused with onsite and onside.

Key facts for online
PropertyValue
Headwordonline
LanguageEnglish
Part of speechAdj
IPA/ˈɒnlaɪn/
Letters6
Frequency rank#659
Misspellings tracked8
Confusable pairs7
SourceWiktionary (kaikki.org)

Frequency rank visualization

Position of online in English word frequency (lower rank = more common)

Source: Wordfreq corpus

Spelling & Dictionary Insight

The English entry for online is 6 letters long, classified as anadj, and transcribed in the International Phonetic Alphabet as /ˈɒnlaɪn/. Corpus data places it at rank #659 in overall English word frequency, putting it firmly in the everyday core of the language.Wiktionary records 7 distinct senses for this headword, so context determines which meaning a reader should apply.

Our Hunspell-derived misspelling index lists 8 documented wrong-spelling variants for online, with forms such as "noline", "olnine", and "onilne". Each variant represents a distinct typo pattern that appears often enough in corpora to be worth flagging, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution.It also participates in 7 confusable-pair relationships, "onsite", "onside", "outline", and more, where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: 1950, from on + line. Root origin matters for spelling because borrowed morphemes (Greek, Latin, Old French, Old English) carry their source-language orthographic conventions into modern English, which is why historical etymology is often the cleanest predictor of whether a cluster like "-ough", "-eau", or "-tion" will appear. For readers arriving here from a spelling check, the authoritative guidance is: the correct English form is online, spelled O-N-L-I-N-E, and any other sequence of those letters, regardless of how natural it feels, is a misspelling in standard orthography.

Definition

  1. 1
    Of a system: connected (generally electrically) to a larger network.
  2. 2
    Of a system: connected (generally electrically) to a larger network.
  3. 3
    Available over, or delivered from, the Internet.
  4. 4
    Connected to the Internet.
  5. 5
    Available on a computer system, even if not networked.
  6. 6
    Of a system: active, particularly building facilities (such as power) or a factory or power plant.
  7. 7
    Immersed in Internet culture. (Usually modified by an intensifier such as extremely or terminally)

Etymology

1950, from on + line.

Antonyms

This word in other languages

Common misspellings

Also misspelled as: noline,olnine,onilne,onlien,onlinne,onlline,onlnie,onnline

Misspelling Pattern Breakdown

Relative frequency of common misspelling types for online

Misspelling Variants of "online"

noline6olnine6onilne6onlien6onlinne7onlline7onlnie6onnline7
Misspelling Variants of "online"

Frequency rank: #659 in English

Frequently Asked Questions

How do you spell "online"?
"online" is spelled O-N-L-I-N-E. The IPA pronunciation is /ˈɒnlaɪn/.
What does "online" mean?
As an adj, "online" means: Of a system: connected (generally electrically) to a larger network.
What words are commonly confused with "online"?
"online" is commonly confused with "onsite", "onside", "outline". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "online"?
The IPA (International Phonetic Alphabet) transcription for "online" is /ˈɒnlaɪn/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "online"?
1950, from on + line. See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Nearby English words

Other entries that begin with the letter O in our English index:

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Data Source: Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Frequency data from Wordfreq. Misspellings derived from Hunspell dictionaries.