noun · 6 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.
Received-Pronunciation:/daɪˈæmɪtə(ɹ)/
General-American:dī-ăm'ĭtər
General-American:/daɪˈæmɪdɚ/
General-American:/daɪˈæmədɚ/
US:Recorded audio is listed in the source snapshot.
CMU ARPABET:D AY0 AE1 M AH0 T ER0
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
noun
Meaning 1
Any straight line between two points on the circumference of a circle that passes through the center of the circle; a chord that passes through the center of the circle.
Definition source: English Wiktionary via Wiktextract
Topics: geometry, mathematics, sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
noun
Meaning 2
The length of such a line.
Definition source: English Wiktionary via Wiktextract
Topics: geometry, mathematics, sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
noun
Meaning 3
The maximum distance between any two points in a metric space.
Definition source: English Wiktionary via Wiktextract
Topics: geometry, mathematics, sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
4
noun
Meaning 4
The maximum eccentricity over all vertices in a graph.
Definition source: English Wiktionary via Wiktextract
Topics: graph-theory, mathematics, sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
5
noun
Meaning 5
the length of a straight line passing through the center of a circle and connecting two points on the circumference
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
a straight line connecting the center of a circle with two points on its perimeter (or the center of a sphere with two points on its surface)
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Broader terms: straight line
History
Etymology
Etymology tree Proto-Indo-European *dwóh1 Proto-Indo-European *dwísder. Ancient Greek διά (diá) Ancient Greek δῐᾰ- (dĭă-) Proto-Indo-European *meh1- Proto-Indo-European *-tḗr Proto-Indo-European *-trom Proto-Hellenic *-tron Ancient Greek -τρον (-tron) Ancient Greek μέτρον (métron) Ancient Greek διάμετρος (diámetros)bor. Latin diametros Old French diametre English diameter From Old French diametre (French diamètre), from Latin diametros, from Ancient Greek διάμετρος (diámetros) (γραμμή (grammḗ)) (diametros grammē, “line measuring across”), from διά (diá, “across”) + μέτρον (métron, “measure”). By surface analysis, dia- + -meter.
Across languages
Translations
133 source translations are retained for this English entry.
Afrikaans:
deursnee
— line
Arabic:
قُطْر
(quṭr)
— line
Armenian:
տրամագիծ
(tramagic)
— line
Azerbaijani:
diametr
— line
Basque:
diametro
— line
Belarusian:
дыя́метр
(dyjámjetr)
— line
Bengali:
ব্যাস
(bês)
— line
Bulgarian:
диаметър
(diametǎr)
— line
Catalan:
diàmetre
— line
Cebuano:
latastid
— line
Chinese Cantonese:
直徑 /直径
(zik6 ging3)
— line
Chinese Mandarin:
直徑 /直径
(zhíjìng)
— line
Czech:
průměr
— line
Danish:
diameter
— line
Danish:
tværmål
— line
Dutch:
middellijn
— line
Dutch:
diameter
— line
Esperanto:
diametro
— line
Estonian:
diameeter
— line
Faroese:
tvørmál
— line
Finnish:
halkaisija
— line
French:
diamètre
— line
Galician:
diámetro
— line
Georgian:
დიამეტრი
(diameṭri)
— line
German:
Durchmesser
— line
German:
Diameter
— line
Greek:
διάμετρος
(diámetros)
— line
Ancient Greek:
διάμετρος
(diámetros)
— line
Gujarati:
વ્યાસ
(vyās)
— line
Haitian Creole:
dyamèt
— line
Hebrew:
קוטר
(qot'er)
— line
Hindi:
व्यास
(vyās)
— line
Hungarian:
átmérő
— line
Icelandic:
þvermál
— line
Ido:
diametro
— line
Indonesian:
diameter
— line
Iquito:
acajinacúraji
— line
Irish:
lárlíne
— line
Italian:
diametro
— line
Japanese:
直径
(chokkei)
— line
Kannada:
ವ್ಯಾಸ
(vyāsa)
— line
Khmer:
អង្កត់ផ្ចិត
(ʼɑɑʼɑngkɑt phcət)
— line
Korean:
지름
(jireum)
— line
Central Kurdish:
تیرە
(tîre)
— line
Northern Kurdish:
tîre
— line
Latin:
diametros
— line
Latvian:
diametrs
— line
Lithuanian:
diametras
— line
Luxembourgish:
Duerchmiesser
— line
Macedonian:
дијаметар
(dijametar)
— line
Macedonian:
пречник
(prečnik)
— line
Malay:
garis pusat
— line
Malay:
diameter
— line
Māori:
whitianga
— line
Marathi:
व्यास
(vyās)
— line
Norwegian Bokmål:
diameter
— line
Norwegian Nynorsk:
diameter
— line
Persian:
قطر
(qotr)
— line
Persian:
ترامون
(tarâmun)
— line
Persian:
گنج دوله
(gonj-e dowle)
— line
Persian:
گنج
(gonj)
— line
Polish:
średnica
— line
Portuguese:
diâmetro
— line
Romagnol:
diàmetar
— line
Romanian:
diametru
— line
Russian:
диа́метр
(diámetr)
— line
Russian:
попере́чник
(poperéčnik)
— line
Serbo-Croatian:
пречник
— line
Serbo-Croatian:
промјер
— line
Serbo-Croatian:
prečnik
— line
Serbo-Croatian:
promjer
— line
Slovak:
priemer
— line
Slovene:
premer
— line
Spanish:
diámetro
— line
Swahili:
kipenyo
— line
Swedish:
diameter
— line
Tagalog:
bantod
— line
Tagalog:
diyametro
— line
Thai:
เส้นผ่าศูนย์กลาง
(sên-pàa-sǔun-glaang)
— line
Thai:
เส้นผ่านศูนย์กลาง
(sen-phan-sun-klang)
— line
Turkish:
çap
— line
Ukrainian:
діа́метр
(diámetr)
— line
Ukrainian:
попере́чник
(poperéčnyk)
— line
Urdu:
قطر
(qotr)
— line
Vietnamese:
đường kính
— line
Walloon:
diyamete
— line
Welsh:
diamedr
— line
Yiddish:
דיאַמעטער
(dyameter)
— line
Arabic:
قُطْر
(quṭr)
— length of this line
Armenian:
տրամագիծ
(tramagic)
— length of this line
Bengali:
ব্যাস
(bês)
— length of this line
Catalan:
diàmetre
— length of this line
Chinese Cantonese:
直徑 /直径
(zik6 ging3)
— length of this line
Chinese Mandarin:
直徑 /直径
(zhíjìng)
— length of this line
Czech:
průměr
— length of this line
Danish:
diameter
— length of this line
Dutch:
diameter
— length of this line
Dutch:
doorsnede
— length of this line
Finnish:
läpimitta
— length of this line
French:
diamètre
— length of this line
Galician:
diámetro
— length of this line
German:
Durchmesser
— length of this line
German:
Diameter
— length of this line
Greek:
διάμετρος
(diámetros)
— length of this line
Haitian Creole:
dyamèt
— length of this line
Hebrew:
קוטר
(qot'er)
— length of this line
Hindi:
व्यास
(vyās)
— length of this line
Irish:
trastomhas
— length of this line
Italian:
diametro
— length of this line
Japanese:
直径
(chokkei)
— length of this line
Kannada:
ವ್ಯಾಸ
(vyāsa)
— length of this line
Kannada:
ವ್ಯಾಸದ ಉದ್ದ
(vyāsada udda)
— length of this line
Korean:
직경
(jikgyeong)
— length of this line
Northern Kurdish:
tîre
— length of this line
Macedonian:
дијаметар
(dijametar)
— length of this line
Macedonian:
пречник
(prečnik)
— length of this line