trojan

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UK/ˈtɹəʊd͡ʒən/US/ˈtɹoʊd͡ʒən/Australia/ˈtɹəʉd͡ʒən/New Zealand/ˈtɹɐʉd͡ʒən/

noun

Malware that appears to perform or actually performs a desired task for a user while performing a harmful task without the user's knowledge or consent.

CommonScrabble 13

Meanings

trojan1

nountrojan (plural trojans)

plural trojans

  1. computingMalware that appears to perform or actually performs a desired task for a user while performing a harmful task without the user's knowledge or consent.
adjectivetrojan (not comparable)
  1. not comparableastronomyDescribing a satellite (moon or minor planet) that shares an orbit with another
verbtrojan (third-person singular simple present trojans, present participle trojaning, simple past and past participle trojaned)

present singular third person trojans · participle present trojaning · participle past trojaned · past trojaned

  1. transitivecomputingTo infect (a system) with a trojan.

Trojan2

nounTrojan (plural Trojans)

plural Trojans · alternative dated Troyan · alternative dated Troian

  1. A native or inhabitant of the ancient city of Troy.
  2. A student (especially an athlete) of the University of Southern California.
  3. astrophysicsA Trojan asteroid.
  4. astrophysicsAn object residing at a Trojan point.
  5. abbreviationellipsiscomputingEllipsis of Trojan horse.
  6. One who shows great pluck, endurance, strength, etc.

    to study like a Trojan

    4 more examples

    Farewell he, he was a kinde good fellow, a true Troyan: and it euer be my lucks to meete him at more leaſure, Ile make him full amendes with a Cup full of Canarie.

    1600, William Kempe, Kemps nine daies vvonder

    Mortified as he was at this suspension of his plan, he had, at any rate, the full satisfaction of knowing not only that he himself had discharged his duty, but that every one under him had done the same, from Jim Bell, who fought like a Trojan, to little Dewhurst, his aide-de-camp, whose first smell of powder this was.

    1837, William Johnson Neale, Gentleman Jack: a naval story, page 193

    We have twice had all we wanted in the way of squalls: once, as I came on deck, I found the green sea over the cockpit coamings and running down the companion like a brook to meet me; at that same moment the foresail sheet jammed and the captain had no knife; this was the only occasion on the cruise that ever I set hand to a rope, but I worked like a Trojan, judging the possibility of haemorrhage better than the certainty of drowning.

    1893, Robert Louis Stevenson, Tales of the South Seas

    Leave all to me, and I'll bring you through it like a Trojan.

    2014, R. Shelton Mackenzie, Bits of Blarney, →ISBN, page 49
adjectiveTrojan (not comparable)

alternative dated Troyan · alternative dated Troian

  1. not comparableOf, or relating to, the famed city of Troy or its inhabitants.
  2. not comparableInvolving great strength or endurance.

    You know you should get up but the thought of making your way to the bathroom to wash is like a trojan task. Why bother?

    2009, D. P. Greene, Couples, page 104
  3. not comparableastrophysicsOf, or relating to, a Trojan point.
  4. not comparablecomputer securityMalicious but disguised as legitimate

Synonyms & antonyms

Broader

nouna native of ancient Troy

nouna program that appears desirable but actually contains something harmful

Broader
malevolent program

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

trojan · noun, adjective, verb

From Trojan horse.

Full word history & related roots →

Trojan · noun, adjective

  1. Ancient GreekΤροίᾱ
  2. LatinTroiānus
  3. Old EnglishTrōiān
  4. Middle EnglishTroiā̆n
  5. EnglishTrojan

From old forms Troyan, Troian, Middle English Troiā̆n, from Old English Trōiān, from Latin Troiānus, from Troia (“Troy”) + -ānus, from Ancient Greek Τροίᾱ (Troíā).

Full word history & related roots →

Translations

Ancient Greek Τρῶες, Τρώϊος
  • Τρῶες (Trôes)person from Troy
  • Τρώϊος (Trṓïos)person from Troy
  • Τρωϊάδες (Trōïádes)person from Troy
  • Τρωϊκός (Trōïkós)relating to the city Troy
  • Τρώϊος (Trṓïos)relating to the city Troy
Catalan troià, troiana
  • troiàperson from Troy
  • troianaperson from Troy
  • troiàrelating to the city Troy
Czech Trójan, Trójanka
  • Trójanperson from Troy
  • Trójankaperson from Troy
  • Trójanastronomical object residing at a Trojan point
  • trojskýrelating to the city Troy
Danish trojaner, trojansk
  • trojanerperson from Troy
  • trojanskrelating to the city Troy
Dutch Trojaan, Trojaans
  • Trojaanperson from Troy
  • Trojaansrelating to the city Troy
Esperanto trojano, trojanino
  • trojanoperson from Troy
  • trojaninoperson from Troy
Finnish troijalainen, troijalainen
  • troijalainenmalware
  • troijalainencelestial object sharing an orbit
  • troijalainenperson from Troy
  • troijalainenastronomical object residing at a Trojan point
  • troijalainenrelating to the city Troy
  • troijalainenrelating to a Trojan point
  • troijalainenrelating to a malware
French cheval de Troie, trojan
  • cheval de Troiemalware
  • trojanmalware
  • troyencelestial object sharing an orbit
  • Troyenperson from Troy
  • Troyenneperson from Troy
  • troyenastronomical object residing at a Trojan point
  • troyenrelating to the city Troy
  • troyenrelating to a Trojan point
German Trojaner, Trojaner
  • Trojanermalware
  • Trojanerperson from Troy
  • Trojanerinperson from Troy
  • Troerperson from Troy
  • Troerinperson from Troy
  • trojanischrelating to the city Troy
Hungarian trójai, trójai
  • trójaiperson from Troy
  • trójairelating to the city Troy
Icelandic Tróverji, Trójumaður
  • Tróverjiperson from Troy
  • Trójumaðurperson from Troy
  • tróverskurrelating to the city Troy
  • trójanskurrelating to the city Troy
Norwegian Bokmål trojaner, trojansk
  • trojanerperson from Troy
  • trojanskrelating to the city Troy
Polish koń trojański, trojan
  • koń trojańskimalware
  • trojanmalware
  • trojańskirelating to the city Troy
Portuguese troiano, troiana
  • troianoperson from Troy
  • troianaperson from Troy
  • troianorelating to the city Troy
Russian троя́н, троя́нец
  • троя́н (troján)malware
  • троя́нец (trojánec)person from Troy
  • троя́нка (trojánka)person from Troy
  • троя́нский (trojánskij)relating to the city Troy
Spanish troyano, troyano
  • troyanoperson from Troy
  • troyanorelating to the city Troy
  • troyanorelating to a malware
Swedish trojan, trojanska
  • trojanperson from Troy
  • trojanskaperson from Troy
  • trojanskrelating to the city Troy
  • trojanskrelating to a malware
Ukrainian троя́нець, троя́нка
  • троя́нець (trojánecʹ)person from Troy
  • троя́нка (trojánka)person from Troy
  • троя́нський (trojánsʹkyj)relating to the city Troy
  • троя́нська (trojánsʹka)relating to the city Troy
Cite this entry
APA

trojan. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/trojan

MLA

“trojan.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/trojan. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “trojan,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/trojan.

Source: trojan on Wiktionary, CC BY-SA 4.0.