Standard Lemma guide

lethal

adj · 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.

  • /ˈliː.θəl/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • rhymes with -iːθəl
  • CMU ARPABET: L IY1 TH AH0 L Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Of, pertaining to, or causing death; deadly; mortal; fatal.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

Any weapon that causes death.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: non-lethal

3

noun

Meaning 3

An allele that causes the death of the organism that carries it.

Definition source: English Wiktionary via Wiktextract

Topics: biology, genetics, medicine, natural-sciences, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

One of the higher alcohols of the paraffine series obtained from spermaceti as a white crystalline solid.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable

Topics: chemistry, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

adjective satellite

Meaning 5

of an instrument of certain death

Definition source: Princeton WordNet 3.0

Examples

  • deadly poisons
  • lethal weapon
  • a lethal injection

Meaning relationships

Synonyms: deadly

Antonyms: none provided

History

Etymology

Learned borrowing from Latin lētālis (“deadly, mortal, fatal”), improperly written lēthālis, from lētum (“death”), improperly written as lēthum, from a supposed connection with Ancient Greek λήθη (lḗthē, “oblivion, forgetfulness”).

Abbreviation of “lauric acid ethereal salt”, so called because it occurs in the ethereal salt of lauric acid.

Across languages

Translations

69 source translations are retained for this English entry.

  • Arabic: مُمِيت (mumīt) — of, pertaining to, or causing death; deadly; mortal; fatal
  • Belarusian: смяро́тны (smjarótny) — of, pertaining to, or causing death; deadly; mortal; fatal
  • Belarusian: смертано́сны (smjertanósny) — of, pertaining to, or causing death; deadly; mortal; fatal
  • Belarusian: лета́льны (ljetálʹny) — of, pertaining to, or causing death; deadly; mortal; fatal
  • Bulgarian: смъртоно́сен (smǎrtonósen) — of, pertaining to, or causing death; deadly; mortal; fatal
  • Bulgarian: смъ́ртен (smǎ́rten) — of, pertaining to, or causing death; deadly; mortal; fatal
  • Bulgarian: лета́лен (letálen) — of, pertaining to, or causing death; deadly; mortal; fatal
  • Catalan: letal — of, pertaining to, or causing death; deadly; mortal; fatal
  • Catalan: mortal — of, pertaining to, or causing death; deadly; mortal; fatal
  • Chinese Mandarin: 致命的 (zhìmìng de) — of, pertaining to, or causing death; deadly; mortal; fatal
  • Chinese Mandarin: 致死的 (zhìsǐdē) — of, pertaining to, or causing death; deadly; mortal; fatal
  • Czech: smrtící — of, pertaining to, or causing death; deadly; mortal; fatal
  • Czech: smrtonosný — of, pertaining to, or causing death; deadly; mortal; fatal
  • Czech: smrtelný — of, pertaining to, or causing death; deadly; mortal; fatal
  • Dutch: dodelijk — of, pertaining to, or causing death; deadly; mortal; fatal
  • Dutch: letaal — of, pertaining to, or causing death; deadly; mortal; fatal
  • Esperanto: mortiga — of, pertaining to, or causing death; deadly; mortal; fatal
  • Finnish: kuolettava — of, pertaining to, or causing death; deadly; mortal; fatal
  • Finnish: tappava — of, pertaining to, or causing death; deadly; mortal; fatal
  • Finnish: letaali — of, pertaining to, or causing death; deadly; mortal; fatal
  • French: létal — of, pertaining to, or causing death; deadly; mortal; fatal
  • French: léthal — of, pertaining to, or causing death; deadly; mortal; fatal
  • French: mortel — of, pertaining to, or causing death; deadly; mortal; fatal
  • French: fatal — of, pertaining to, or causing death; deadly; mortal; fatal
  • Georgian: მომაკვდინებელი (momaḳvdinebeli) — of, pertaining to, or causing death; deadly; mortal; fatal
  • Georgian: სასიკვდილო (sasiḳvdilo) — of, pertaining to, or causing death; deadly; mortal; fatal
  • Georgian: ლეტალური (leṭaluri) — of, pertaining to, or causing death; deadly; mortal; fatal
  • German: tödlich — of, pertaining to, or causing death; deadly; mortal; fatal
  • German: letal — of, pertaining to, or causing death; deadly; mortal; fatal
  • Greek: φονικός (fonikós) — of, pertaining to, or causing death; deadly; mortal; fatal
  • Greek: θανατηφόρος (thanatifóros) — of, pertaining to, or causing death; deadly; mortal; fatal
  • Ancient Greek: θανάσιμος (thanásimos) — of, pertaining to, or causing death; deadly; mortal; fatal
  • Indonesian: letal — of, pertaining to, or causing death; deadly; mortal; fatal
  • Irish: marfach — of, pertaining to, or causing death; deadly; mortal; fatal
  • Italian: letale — of, pertaining to, or causing death; deadly; mortal; fatal
  • Japanese: 必殺の (hissatsu no) — of, pertaining to, or causing death; deadly; mortal; fatal
  • Japanese: 致命的な (chimeiteki na) — of, pertaining to, or causing death; deadly; mortal; fatal
  • Japanese: 致死の (chishi no) — of, pertaining to, or causing death; deadly; mortal; fatal
  • Korean: 치명적인 (chimyeongjeog-in) — of, pertaining to, or causing death; deadly; mortal; fatal
  • Korean: 치사의 (chisaui) — of, pertaining to, or causing death; deadly; mortal; fatal
  • Latin: mortifer — of, pertaining to, or causing death; deadly; mortal; fatal
  • Latin: mortiferus — of, pertaining to, or causing death; deadly; mortal; fatal
  • Latin: lētālis — of, pertaining to, or causing death; deadly; mortal; fatal
  • Latin: lēthālis — of, pertaining to, or causing death; deadly; mortal; fatal
  • Macedonian: смртен (smrten) — of, pertaining to, or causing death; deadly; mortal; fatal
  • Polish: letalny — of, pertaining to, or causing death; deadly; mortal; fatal
  • Polish: śmiertelny — of, pertaining to, or causing death; deadly; mortal; fatal
  • Polish: śmiercionośny — of, pertaining to, or causing death; deadly; mortal; fatal
  • Portuguese: fatal — of, pertaining to, or causing death; deadly; mortal; fatal
  • Portuguese: letal — of, pertaining to, or causing death; deadly; mortal; fatal
  • Portuguese: mortal — of, pertaining to, or causing death; deadly; mortal; fatal
  • Russian: смерте́льный (smertélʹnyj) — of, pertaining to, or causing death; deadly; mortal; fatal
  • Russian: смертоно́сный (smertonósnyj) — of, pertaining to, or causing death; deadly; mortal; fatal
  • Russian: лета́льный (letálʹnyj) — of, pertaining to, or causing death; deadly; mortal; fatal
  • Serbo-Croatian: смр̏тан — of, pertaining to, or causing death; deadly; mortal; fatal
  • Serbo-Croatian: смрто̀носан — of, pertaining to, or causing death; deadly; mortal; fatal
  • Serbo-Croatian: smȑtan — of, pertaining to, or causing death; deadly; mortal; fatal
  • Serbo-Croatian: smrtònosan — of, pertaining to, or causing death; deadly; mortal; fatal
  • Slovak: smrteľný — of, pertaining to, or causing death; deadly; mortal; fatal
  • Slovak: smrtonosný — of, pertaining to, or causing death; deadly; mortal; fatal
  • Slovak: smrtiaci — of, pertaining to, or causing death; deadly; mortal; fatal
  • Slovene: smrtonosen — of, pertaining to, or causing death; deadly; mortal; fatal
  • Slovene: smrten — of, pertaining to, or causing death; deadly; mortal; fatal
  • Spanish: letal — of, pertaining to, or causing death; deadly; mortal; fatal
  • Swedish: dödlig — of, pertaining to, or causing death; deadly; mortal; fatal
  • Swedish: livsfarlig — of, pertaining to, or causing death; deadly; mortal; fatal
  • Ukrainian: смерте́льний (smertélʹnyj) — of, pertaining to, or causing death; deadly; mortal; fatal
  • Ukrainian: смертоно́сний (smertonósnyj) — of, pertaining to, or causing death; deadly; mortal; fatal
  • Ukrainian: лета́льний (letálʹnyj) — of, pertaining to, or causing death; deadly; mortal; fatal
Real reading context

lethal in complete knowledge articles