tro|jan /troʊ dʒən/ (trojans ) N‑COUNT A trojan is a computer program that gets access to a computer or system by appearing to be harmless, but is designed to do something damaging. [COMPUTING ] □ Spammers gain control of your computer by infecting it with a trojan.
Tro|jan horse /troʊ dʒən hɔː r s/ (Trojan horses )
1 N‑COUNT [usu sing] If you describe a person or thing as a Trojan horse , you mean that they are being used to hide someone's true purpose or intentions. [DISAPPROVAL ] □ They claim he is a Trojan horse being used by the party bosses attempting to steal the nomination. [Also + for/of ]
2 N‑COUNT A Trojan horse the same as a trojan . [COMPUTING ]
troll /trɒ l, troʊ l/ (trolls , trolling , trolled )
1 N‑COUNT In Scandinavian mythology, trolls are creatures who look like ugly people. They live in caves or on mountains and steal children.
2 VERB If you troll somewhere, you go there in a casual and unhurried way. [mainly BRIT , INFORMAL ] □ [V prep/adv] I trolled along to see Michael Frayn's play, 'Noises Off'.
3 VERB If you troll through papers or files, you look through them in a fairly casual way. [mainly BRIT , INFORMAL ] □ [V + through ] Trolling through the files revealed a photograph of me drinking coffee in the office.
4 N‑COUNT A troll is someone who posts unkind or offensive messages on social media sites, and often tries to start arguments with other users. [COMPUTING ]
trol|ley /trɒ li/ (trolleys )
1 N‑COUNT A trolley is an object with wheels that you use to transport heavy things such as shopping or luggage. [BRIT ] □ A porter relieved her of the three large cases she had been pushing on a trolley. □ …supermarket trolleys. in AM, use cart 2 N‑COUNT A trolley is a small table on wheels which is used for serving drinks or food. [BRIT ] in AM, use cart 3 N‑COUNT A trolley is a bed on wheels for moving patients in hospital. [BRIT ] in AM, use gurney 4 N‑COUNT A trolley or trolley car is an electric vehicle for carrying people which travels on rails in the streets of a town. [AM ] □ He took a northbound trolley on State Street. in BRIT, use tram
5 PHRASE If you say that someone is off their trolley , you mean that their ideas or behaviour are very strange. [BRIT , INFORMAL ]
tro l|ley bus (trolley buses ) N‑COUNT [oft by N ] A trolley bus is a bus that is driven by electric power taken from cables above the street.
trom|bone /trɒmboʊ n/ (trombones ) N‑VAR A trombone is a large musical instrument of the brass family. It consists of two long oval tubes, one of which can be pushed backwards and forwards to play different notes.
trom|bon|ist /trɒmboʊ n I st/ (trombonists ) N‑COUNT A trombonist is someone who plays the trombone.
trompe l'oeil /trɒ mp lɔ I / (trompe l'oeils )
1 N‑UNCOUNT [oft N n] Trompe l'oeil is a technique used in art in which objects are painted their normal size in a very realistic way, to make people think that the objects are solid and real. □ …a trompe l'oeil painting.
2 N‑COUNT A trompe l'oeil is a trompe l'oeil painting.
troop ◆◆◇ /truː p/ (troops , trooping , trooped )
1 N‑PLURAL Troops are soldiers, especially when they are in a large organized group doing a particular task. □ The operation will involve more than 35,000 troops from a dozen countries.
2 N‑COUNT [with sing or pl verb] A troop is a group of soldiers within a cavalry or armoured regiment. □ [+ of ] …a troop of enemy cavalry trotting towards the Dutch right flank.
3 N‑COUNT A troop of people or animals is a group of them. □ [+ of ] Amy was aware of the little troop of travellers watching the two of them.
4 VERB If people troop somewhere, they walk there in a group, often in a sad or tired way. [INFORMAL ] □ [V adv/prep] They all trooped back to the house for a rest.
troop|er /truː pə r / (troopers )
1 N‑COUNT ; N‑TITLE A trooper is a soldier of low rank in the cavalry or in an armoured regiment in the army. □ …a trooper from the 7th Cavalry.
2 N‑COUNT In the United States, a trooper is a police officer in a state police force. □ Once long ago, he had considered becoming a state trooper.
3 → see also storm trooper
troop|ship /truː pʃ I p/ (troopships ) also troop ship N‑COUNT A troopship is a ship on which large numbers of soldiers are taken from one place to another.
tro|phy /troʊ fi/ (trophies )
1 N‑COUNT A trophy is a prize, for example a silver cup, that is given to the winner of a competition or race.
2 N‑COUNT Trophy is used in the names of some competitions and races in which the winner receives a trophy. □ He finished third in the Tote Gold Trophy.
3 N‑COUNT A trophy is something that you keep in order to show that you have done something very difficult. □ [+ of ] His office was lined with animal heads, trophies of his hunting hobby.
tropi|cal /trɒ p I k ə l/
1 ADJ [ADJ n] Tropical means belonging to or typical of the tropics. □ …tropical diseases. □ …a plan to preserve the world's tropical forests.
2 ADJ Tropical weather is hot and damp weather that people believe to be typical of the tropics.
Trop|ic of Can|cer /trɒ p I k əv kæ nsə r / N‑PROPER The Tropic of Cancer is an imaginary line around the Earth 23° 26′ north of the equator.