theorem
the·o·rem/ˈθiː.ə.ɹəm/noun, verb
theorem is spelled T-H-E-O-R-E-M, 3 syllables: the·o·rem. The wrong spelling people search most is theorum: about 70 Bing searches a month in the United States (September 2025 to August 2026), about 1 in 13 of all searches for the word. Theorem is a noun meaning “A mathematical statement of some importance that has been proven to be true. Minor theorems are often called…”. The plural of theorem is theorems.
How many letters and syllables are in theorem?
| Letters | 7: T-H-E-O-R-E-M |
|---|---|
| Syllables | 3: the·o·rem |
| In writing | 5.1 times per million words; the 11,015th most frequent word form |
| Wrong spellings searched | 1; the most searched, theorum, about 70 Bing searches a month (all of them) |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media); Bing searches in the United States: the average month from September 2025 to August 2026 (Microsoft Advertising keyword data through DataForSEO, read September 30, 2026).
How do you spell theorem?
Theorem is spelled T-H-E-O-R-E-M. One wrong spelling is searched or written often enough to measure; together they are about 1 in 13 of the searches for theorem in either form.
Bing searches in the United States: the average month from September 2025 to August 2026 (Microsoft Advertising keyword data through DataForSEO, read September 30, 2026). Wrong spellings are taken from Wiktionary entries tagged "misspelling" and its obsolete or nonstandard forms, Wikipedia's Lists of common misspellings and the codespell dictionary, then measured. The proofreader's marks show the change that corrects each one.
How common is theorem?
Theorem appears 5.1 times per million words in written English, the 11,015th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How do you pronounce theorem?
- UK /ˈθiː.ə.ɹəm/
- British /ˈθɪːɹ(ə)m/
- British /ˈθɪjəɹ(ə)m/
Theorem has 3 syllables, split the·o·rem in writing.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Vealhurl-theorem.wav, Wikimedia Commons (author and licence on each file's page).
Forms of theorem
- theorems plural, present, singular, he/she/it
- theoreming participle, present
- theoremed participle, past
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does theorem mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
A mathematical statement of some importance that has been proven to be true. Minor theorems are often called propositions. Theorems which are not very interesting in themselves but are an essential part of a bigger theorem's proof are called lemmas.
- 2
colloquialnonstandardA mathematical statement that is expected to be true.
Fermat's Last Theorem was known thus long before it was proved in the 1990s.
- 3
A syntactically correct expression that is deducible from the given axioms of a deductive system.
verb
- 1
To formulate into a theorem.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Theorem in Spanish, French, German and Portuguese
| Language | Words |
|---|---|
| French | théorème |
| German | Theorem, Satz, Lehrsatz |
| Portuguese | teorema , conjectura |
| Spanish | teorema , teoría, conjetura, suposición, especulación |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does theorem come from?
From Middle French théorème, from Late Latin theōrēma, from Ancient Greek θεώρημα (theṓrēma, “speculation, proposition to be proved”) (Euclid), from θεωρέω (theōréō, “to look at, view, consider, examine”), from θεωρός (theōrós, “spectator”), from θέα (théa, “a view”) + ὁράω (horáō, “to see, look”). See also theory, and theater.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).