name · noun · 5 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:/ˈmæs.tə.dɒn/
General-American:/ˈmæs.tə.dɑn/
General-American:/-dən/
rhymes with -æstədɒn
rhymes with -æstədən
General-American:/ˈmæs.tə.dən/
Southern-England:Recorded audio is listed in the source snapshot.
CMU ARPABET:M AE1 S T AH0 D AO2 N
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
name
Meaning 1
A decentralized microblogging platform, part of the Fediverse.
Definition source: English Wiktionary via Wiktextract
Qualifier: social media
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
noun
Meaning 2
Extinct elephant-like mammal of the genus †Mammut that flourished worldwide from Miocene through Pleistocene times; differs from elephants and mammoths in the form of the molar teeth.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: incognitum
Antonyms: none provided
3
noun
Meaning 3
Anything awkwardly large or unwieldy.
Definition source: English Wiktionary via Wiktextract
Usage: figuratively
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
4
noun
Meaning 4
A nickname for both the 4-8-0 and (though erroneously) the 4-10-0 train configurations.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
5
noun
Meaning 5
extinct elephant-like mammal that flourished worldwide from Miocene through Pleistocene times; differ from mammoths in the form of the molar teeth
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: mastodont
Antonyms: none provided
Broader terms: proboscidean, proboscidian
Narrower terms: American mastodon, American mastodont, Mammut americanum
History
Etymology
See mastodon.
First attested 1813, from translingual Mastodon (1806), coined by French naturalist Georges Cuvier, from masto- (“breast”) + -odon (“tooth”), due to the mammilloid (“nipple-shaped”) projections on the crowns of the extinct mammal's molars.
Across languages
Translations
29 source translations are retained for this English entry.
