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bulb

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

Letters

4 characters

Language

English

word origin

Source

Wiktionary

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Detailed reference entry for the English word "bulb", 4-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 "bulb" 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 "bulb" for academic writing, checking homophone confusion, or exploring etymological origins, this page provides a citation-backed, free reference that requires no sign-up.

bulb is aEnglishnoun. It means: The bulb-shaped underground portion of a plant such as a tulip, consisting of a shortened stem and many fleshy scale leaves, from which the rest of the plant may be regrown. Pronounced /ˈbʌlb/. Often confused with but and buy.

Key facts for bulb
PropertyValue
Headwordbulb
LanguageEnglish
Part of speechNoun
IPA/ˈbʌlb/
Letters4
Frequency rank#11,846
Misspellings tracked6
Confusable pairs20
SourceWiktionary (kaikki.org)

Frequency rank visualization

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

Source: Wordfreq corpus

Spelling & Dictionary Insight

The English entry for bulb is 4 letters long, classified as anoun, and transcribed in the International Phonetic Alphabet as /ˈbʌlb/. Corpus data places it at rank #11,846 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it.Wiktionary records 6 distinct senses for this headword, so context determines which meaning a reader should apply.

Our Hunspell-derived misspelling index lists 6 documented wrong-spelling variants for bulb, with forms such as "bbulb", "blub", and "bubl". 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 20 confusable-pair relationships, "but", "buy", "bus", and more, where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: Etymology tree Ancient Greek βολβός (bolbós)bor. Latin bulbusder. English bulb Inherited from Middle English bulb, bolbe, from Latin bulbus (“bulb, onion”), from Ancient Greek βολβός (bolbós, “plant with round swelling on underground stem”). 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 bulb, spelled B-U-L-B, and any other sequence of those letters, regardless of how natural it feels, is a misspelling in standard orthography.

Definition

  1. 1
    The bulb-shaped underground portion of a plant such as a tulip, consisting of a shortened stem and many fleshy scale leaves, from which the rest of the plant may be regrown.
  2. 2
    The medulla oblongata.
  3. 3
    Any solid object rounded at one end and tapering on the other, possibly attached to a larger object at the tapered end.
  4. 4
    Any solid object rounded at one end and tapering on the other, possibly attached to a larger object at the tapered end.
  5. 5
    A bulbous protuberance at the forefoot of certain vessels to reduce turbulence.
  6. 6
    An onion.

Etymology

Etymology tree Ancient Greek βολβός (bolbós)bor. Latin bulbusder. English bulb Inherited from Middle English bulb, bolbe, from Latin bulbus (“bulb, onion”), from Ancient Greek βολβός (bolbós, “plant with round swelling on underground stem”).

This word in other languages

Common misspellings

Also misspelled as: bbulb,blub,bubl,bulbb,bullb,ublb

Misspelling Pattern Breakdown

Relative frequency of common misspelling types for bulb

Misspelling Variants of "bulb"

bbulb5blub4bubl4bulbb5bullb5ublb4
Misspelling Variants of "bulb"

Frequency rank: #11,846 in English

Frequently Asked Questions

How do you spell "bulb"?
"bulb" is spelled B-U-L-B. The IPA pronunciation is /ˈbʌlb/.
What does "bulb" mean?
As a noun, "bulb" means: The bulb-shaped underground portion of a plant such as a tulip, consisting of a shortened stem and many fleshy scale leaves, from which the rest of the plant may be regrown.
What words are commonly confused with "bulb"?
"bulb" is commonly confused with "but", "buy", "bus". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "bulb"?
The IPA (International Phonetic Alphabet) transcription for "bulb" is /ˈbʌlb/. 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 "bulb"?
Etymology tree Ancient Greek βολβός (bolbós)bor. Latin bulbusder. English bulb Inherited from Middle English bulb, bolbe, from Latin bulbus (“bulb, onion”), from Ancient Greek βολβός (bolbós, “plant with round swelling on underground stem”). 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 B 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.