Standard Lemma guide

reptilian

adj · noun · 9 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.

  • UK: /ɹɛpˈtɪliən/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • US: /ɹɛpˈtɪljən/
  • US: /ɹɛpˈtɪliən/
  • CMU ARPABET: R EH0 P T IH1 L Y AH0 N Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Of or relating to the members of the class Reptilia (reptiles).

Definition source: English Wiktionary via Wiktextract

Topics: biology, natural-sciences, zoology

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: reptilious, reptitious

Antonyms: none provided

2

adj

Meaning 2

Reptilelike.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: reptitious, saurian, reptilelike, reptilian, reptilious, sauroid

Antonyms: none provided

3

adj

Meaning 3

Unthinking, low, base, contemptible.

Definition source: English Wiktionary via Wiktextract

Usage: figuratively

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: despicable, loathsome, abject, filthy, base, beggarly, blameworthy, carrion, cheap, choical, contemptible, cringing, damnable, dedecorous, degraded, deplorable, deridable, derisible, despisable, dirty, discreditable, disdainable, disgraceful, dishonorable, disreputable, execrable, groveling, hylic, hylical, ignoble, ignominious, inglorious, lame, laughable, lousy, low, ludicrous, mean, mean-spirited, miserable, obscene, outrageous, paltry, pathetic, pissass, pitiable, pitiful, plebeian, punk, putrid, reprehensible, reprehensive, reptile, reptilian, reptitious, ridiculous, risible, roynish, scabbed, scald, scornworthy, scummy, scurvy, shabby, shameful, shit, sleazy, slavish, slimy, sordid, sorry, trashy, ugly, uncommendable, uncool, unmentionable, unwashed, unsophisticated, unworthy, vile, vulgar, weak, worthless, wretched

Antonyms: none provided

4

adj

Meaning 4

Cold-blooded, treacherous, unavoidably selfish and hostile.

Definition source: English Wiktionary via Wiktextract

Usage: figuratively

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: emotionless, reptitious, viperish, viperous, alexithymic, apathistical, clinical, dull, phlegmatic, cold-blooded, cold-hearted, dead inside, dispassionate, immovable, impassible, impassive, insensible, nonemotional, nonfeeling, nonpassionate, nonsentimental, stolid, unemotional, unfeeling, unmovable, unpassionate, unsentimental, booky, dastardly, disleal, disloyal, double-crossing, double-dealing, double-faced, double-hearted, doublehearted, faithless, false, falseheart, false-hearted, guiled, guileful, hollow-hearted, illoyal, infidelitous, insidious, Judaslike, Judasly, nonfaithful, perfidious, proditorious, proditory, Punic, ratlike, recreant, renegade, reptilian, swike, traitorish, traitorlike, traitorly, traitorous, traitorsome, treacherous, treachersome, trothless, unfaithful, unleal, unloyal, unsteadfast, untrue

Antonyms: none provided

5

noun

Meaning 5

A reptilian animal: a reptile.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: creeper, reptile

Antonyms: none provided

6

noun

Meaning 6

A reptilian person, especially (ethnic slur) a Jew.

Definition source: English Wiktionary via Wiktextract

Usage: figuratively

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

7

noun

Meaning 7

A reptilian alien, especially (ufology, often capitalized) of a shapeshifting race alleged to secretly control the world.

Definition source: English Wiktionary via Wiktextract

Topics: literature, media, publishing, science-fiction

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: reptoid

Antonyms: none provided

8

adjective

Meaning 8

of or relating to the class Reptilia

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

9

noun

Meaning 9

any cold-blooded vertebrate of the class Reptilia including tortoises, turtles, snakes, lizards, alligators, crocodiles, and extinct forms

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: reptile

Antonyms: none provided

Broader terms: vertebrate, craniate

Narrower terms: anapsid, anapsid reptile, diapsid, diapsid reptile, Diapsida, subclass Diapsida, synapsid, synapsid reptile

History

Etymology

From reptile + -ian, replacing earlier reptilious and adjectival reptile.