Meanings
eighteen1
alternative 18 · alternative XVIII
- The cardinal number occurring after seventeen and before nineteen, represented in Roman numerals as XVIII and in Arabic numerals as 18.
The right of citizens of the United States, who are eighteen years of age or older, to vote shall not be denied or abridged by the United States or by any State on account of age.
1971, Twenty-sixth Amendment to the United States Constitution
Eighteen2
- A surname.
Synonyms & antonyms
Synonym sets from Open English WordNet, CC BY 4.0.
Origin
eighteen · numeral
- Proto-Indo-European*oḱtṓw
- Proto-Germanic*ahtōu
- Proto-Indo-European*déḱm̥
- Proto-Germanic*tehun
- Proto-Germanic*ahtōutehun
- Anglian Old Englisheahtatēne
- Middle Englisheightetene
- Englisheighteen
From Middle English eightetene, eiȝtene, ehtetene, from Old English eahtatīene, eahtatēne, from Proto-Germanic *ahtōutehun. Cognate with West Frisian achttjin, Dutch achttien, German achtzehn, Danish atten. Equivalent to eight + -teen.
More words from Middle English, Old English, Proto-Germanic
Full word history & related roots →Eighteen · proper noun
Derived from place names such as Ayton, Eaton, and Eton.
Full word history & related roots →Translations
Afrikaans agtien, agttien
- agtiencardinal number
- agttiencardinal number
Ancient Greek ὀκτωκαίδεκα, ιη΄
- ὀκτωκαίδεκα (oktōkaídeka)cardinal number
- ιη΄cardinal number
Arabic ثَمَانِيَةَ عَشَرَ
- ثَمَانِيَةَ عَشَرَ (ṯamāniyata ʕašara)cardinal number
Basque hemezortzi, hamazortzi
- hemezortzicardinal number
- hamazortzicardinal number
Bengali আঠারো
- আঠারো (aṭharō)cardinal number
Bulgarian осемна́десет, осемна́йсет
- осемна́десет (osemnádeset)cardinal number
- осемна́йсет (osemnájset)cardinal number
Catalan divuit, díhuit
- divuitcardinal number
- díhuitcardinal number
Chinese Cantonese 十八
- 十八 (sap⁶ baat³)cardinal number
Chinese Mandarin 十八
- 十八 (shíbā)cardinal number
Czech osmnáct
- osmnáctcardinal number
Danish atten
- attencardinal number
Dutch achttien
- achttiencardinal number
Esperanto dek ok
- dek okcardinal number
Estonian kaheksateist
- kaheksateistcardinal number
Finnish kahdeksantoista
- kahdeksantoistacardinal number
French dix-huit
- dix-huitcardinal number
German achtzehn
- achtzehncardinal number
Greek δεκαοκτώ
- δεκαοκτώ (dekaoktó)cardinal number
Hawaiian ʻumikūmāwalu
- ʻumikūmāwalucardinal number
Hebrew שְׁמוֹנֶה־עֶשְׂרֵה, שְׁמוֹנָה־עָשָׂר
- שְׁמוֹנֶה־עֶשְׂרֵה (shmone-esre)cardinal number
- שְׁמוֹנָה־עָשָׂר (shmona-asar)cardinal number
Hindi अठारह
- अठारह (aṭhārah)cardinal number
Hungarian tizennyolc
- tizennyolccardinal number
Icelandic átján, áttján
- átjáncardinal number
- áttjáncardinal number
Indonesian delapan belas
- delapan belascardinal number
Irish ocht déag
- ocht déagcardinal number
Italian diciotto
- diciottocardinal number
Japanese 十八
- 十八 (jūhachi)cardinal number
Korean 열여덟, 십팔
- 열여덟 (yeoryeodeol)cardinal number
- 십팔 (sip'pal)cardinal number
Latin octōdecim, duodēvīgintī
- octōdecimcardinal number
- duodēvīgintīcardinal number
Latvian astoņpadsmit
- astoņpadsmitcardinal number
Lithuanian aštuoniolika
- aštuoniolikacardinal number
Malay lapan belas, delapan belas
- lapan belascardinal number
- delapan belascardinal number
- sepuluh lapancardinal number
- sepuluh delapancardinal number
- satu puluh lapancardinal number
- satu puluh delapancardinal number
Māori tekau mā waru
- tekau mā warucardinal number
Norwegian atten
- attencardinal number
Persian هجده, هیجده
- هجده (hejdah)cardinal number
- هیجده (hijdah)cardinal number
Polish osiemnaście, osiemnaścioro
- osiemnaściecardinal number
- osiemnaściorocardinal number
Portuguese dezoito
- dezoitocardinal number
Punjabi ਅਠਾਰਾਂ
- ਅਠਾਰਾਂ (aṭhārā̃)cardinal number
Romanian optsprezece
- optsprezececardinal number
Russian восемна́дцать
- восемна́дцать (vosemnádcatʹ)cardinal number
Scottish Gaelic ochd-deug
- ochd-deugcardinal number
Slovak osemnásť
- osemnásťcardinal number
Spanish dieciocho
- dieciochocardinal number
Swahili kumi na nane
- kumi na nanecardinal number
Swedish arton, aderton
- artoncardinal number
- adertoncardinal number
Tagalog labingwalo
- labingwalocardinal number
Tamil பதினெட்டு
- பதினெட்டு (patiṉeṭṭu)cardinal number
Thai สิบแปด
- สิบแปด (sìp-bpɛ̀ɛt)cardinal number
Turkish on sekiz
- on sekizcardinal number
Ukrainian вісімна́дцять
- вісімна́дцять (visimnádcjatʹ)cardinal number
Urdu اٹھارہ
- اٹھارہ (aṭhārah)cardinal number
Vietnamese mười tám
- mười támcardinal number
Welsh deunaw, un deg wyth
- deunawcardinal number
- un deg wythcardinal number
Yiddish אַכצן
- אַכצן (akhtsn)cardinal number
Rhymes & wordplay
Rhymes with eighteen
Cite this entry
eighteen. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/eighteen
“eighteen.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/eighteen. Accessed November 3, 2026.
WatkinsX Dictionary, s.v. “eighteen,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/eighteen.
Source: eighteen on Wiktionary, CC BY-SA 4.0.