Standard Lemma guide

deadly

adj · adv · 17 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.

  • General-American, Received-Pronunciation: /ˈdɛdli/
  • General-American: Recorded audio is listed in the source snapshot.
  • rhymes with -ɛdli
  • CMU ARPABET: D EH1 D L IY0 Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Subject to death; mortal.

Definition source: English Wiktionary via Wiktextract

Usage: obsolete, rare

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adj

Meaning 2

Causing death; lethal.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

adj

Meaning 3

Aiming or willing to destroy; implacable; desperately hostile.

Definition source: English Wiktionary via Wiktextract

Examples

  • deadly enemies

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

adj

Meaning 4

Very accurate (of aiming with a bow, firearm, etc.).

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

adj

Meaning 5

Very boring.

Definition source: English Wiktionary via Wiktextract

Usage: informal

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

adj

Meaning 6

Excellent, awesome, cool.

Definition source: English Wiktionary via Wiktextract

Usage: Ireland, Newfoundland, informal

Qualifier: Australian Aboriginal

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

7

adv

Meaning 7

Fatally, mortally.

Definition source: English Wiktionary via Wiktextract

Usage: obsolete

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

8

adv

Meaning 8

In a way which suggests death.

Definition source: English Wiktionary via Wiktextract

Examples

  • Her face suddenly became deadly white.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

9

adv

Meaning 9

Extremely, incredibly.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

10

adjective satellite

Meaning 10

(of a disease) having a rapid course and violent effect

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

11

adjective satellite

Meaning 11

causing or capable of causing death

Definition source: Princeton WordNet 3.0

Examples

  • a fatal accident
  • a deadly enemy
  • mortal combat
  • a mortal illness

Meaning relationships

Synonyms: deathly, mortal

Antonyms: none provided

12

adjective satellite

Meaning 12

of an instrument of certain death

Definition source: Princeton WordNet 3.0

Examples

  • deadly poisons
  • lethal weapon
  • a lethal injection

Meaning relationships

Synonyms: lethal

Antonyms: none provided

13

adjective satellite

Meaning 13

exceedingly harmful

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: baneful, pernicious, pestilent

Antonyms: none provided

14

adjective satellite

Meaning 14

involving loss of divine grace or spiritual death

Definition source: Princeton WordNet 3.0

Examples

  • the seven deadly sins

Meaning relationships

Synonyms: mortal(a)

Antonyms: none provided

15

adjective satellite

Meaning 15

extremely poisonous or injurious; producing venom

Definition source: Princeton WordNet 3.0

Examples

  • venomous snakes
  • a virulent insect bite

Meaning relationships

Synonyms: venomous, virulent

Antonyms: none provided

16

adverb

Meaning 16

(used as intensives) extremely

Definition source: Princeton WordNet 3.0

Examples

  • she was madly in love
  • deadly dull
  • deadly earnest
  • deucedly clever
  • insanely jealous

Meaning relationships

Synonyms: madly, insanely, deucedly, devilishly

Antonyms: none provided

17

adverb

Meaning 17

as if dead

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: lifelessly

Antonyms: none provided

History

Etymology

From Middle English dedly, dedlych, dedlich, from Old English dēadlīċ (adjective), from Proto-West Germanic *dauþalīk, from Proto-Germanic *dauþalīkaz (“deadly”, literally “deathly”). By surface analysis, dead + -ly. Cognate with Saterland Frisian dodelk (“deadly”), West Frisian deadlik (“deadly”), Dutch dodelijk (“deadly”), German tödlich (“deadly”), Swedish dödlig (“deadly, fatal, mortal”), Icelandic dauðlegur (“mortal”). The adverb is from Middle English dedliche, from Old English dēadlīċe (adverb), from the adjective.

Across languages

Translations

80 source translations are retained for this English entry.

  • Afrikaans: dodelik — lethal
  • Arabic: مُمِيت (mumīt) — lethal
  • Armenian: մահացու (mahacʻu) — lethal
  • Asturian: mortal — lethal
  • Asturian: mortíferu — lethal
  • Azerbaijani: ölümcül — lethal
  • Azerbaijani: ölümsaçan — lethal
  • Belarusian: смяро́тны (smjarótny) — lethal
  • Belarusian: смертано́сны (smjertanósny) — lethal
  • Bulgarian: уби́йствен (ubíjstven) — lethal
  • Bulgarian: смъртоно́сен (smǎrtonósen) — lethal
  • Catalan: mortal — lethal
  • Catalan: letal — lethal
  • Catalan: mortífer — lethal
  • Czech: smrtelný — lethal
  • Czech: smrtící — lethal
  • Czech: smrtonosný — lethal
  • Dutch: dodelijk — lethal
  • Finnish: tappava — lethal
  • Finnish: kuolettava — lethal
  • French: mortel — lethal
  • French: fatal — lethal
  • French: létal — lethal
  • Galician: mortal — lethal
  • Galician: letal — lethal
  • Galician: mortífero — lethal
  • German: tödlich — lethal
  • Ancient Greek: θανάσιμος (thanásimos) — lethal
  • Hebrew: קַטְלָנִי (katlaní) — lethal
  • Hebrew: קַטְלָנִית (katlanít) — lethal
  • Icelandic: banvænn — lethal
  • Latin: mortifer — lethal
  • Latin: lētālis — lethal
  • Latin: exitiālis — lethal
  • Latvian: nāvīgs — lethal
  • Latvian: nāvējošs — lethal
  • Middle English: dedly — lethal
  • Norwegian Bokmål: dødelig — lethal
  • Norwegian Nynorsk: dødeleg — lethal
  • Old English: dēadlīċ — lethal
  • Pannonian Rusyn: смертельни (smertelʹni) — lethal
  • Portuguese: mortal — lethal
  • Portuguese: fatal — lethal
  • Portuguese: letal — lethal
  • Portuguese: mortífero — lethal
  • Portuguese: fatífero — lethal
  • Romanian: ucigător — lethal
  • Romanian: mortal — lethal
  • Romanian: letal — lethal
  • Russian: смерте́льный (smertélʹnyj) — lethal
  • Russian: уби́йственный (ubíjstvennyj) — lethal
  • Russian: смертоно́сный (smertonósnyj) — lethal
  • Slovak: smrteľný — lethal
  • Slovak: smrtonosný — lethal
  • Slovak: smrtiaci — lethal
  • Spanish: mortal — lethal
  • Spanish: letal — lethal
  • Spanish: mortífero — lethal
  • Swedish: dödlig — lethal
  • Ukrainian: смерте́льний (smertélʹnyj) — lethal
  • Ukrainian: смертоно́сний (smertonósnyj) — lethal
  • Bulgarian: много точен (mnogo točen) — very accurate
  • Finnish: murhaavan tarkka — very accurate
  • Swedish: dödlig — very accurate
  • Bulgarian: много скучен (mnogo skučen) — very boring
  • Finnish: tappavan tylsä — very boring
  • French: mortel — very boring
  • Finnish: mahtava — excellent, awesome, cool
  • Australian Kriol: dedli — excellent, awesome, cool
  • Australian Kriol: dedliwan — excellent, awesome, cool
  • Romanian: mortal — excellent, awesome, cool
  • Russian: великоле́пный (velikolépnyj) — excellent, awesome, cool
  • Finnish: kuolettavasti — Fatally, mortally
  • Latvian: nāvīgi — Fatally, mortally
  • Romanian: fatalmente — Fatally, mortally
  • Romanian: mortal — Fatally, mortally
  • Russian: смертельно (smertelʹno) — Fatally, mortally
  • Finnish: kalman- — In a way which suggests death
  • Finnish: kuoleman- — In a way which suggests death
  • Russian: смертельно (smertelʹno) — In a way which suggests death
Real reading context

deadly in complete knowledge articles