Oxford Basic American Dictionary

( MATH ) the type of mathematics that deals with the relationship between the sides and angles of triangles (= shapes with three sides )

tril • lion / ' trilyan / number 1,000,000,000,000; one million million The country is trilllions of dollars in debt.

tril • o • gy / ' trilad3i / noun [ count ] ( plural tril - o . gies )

( ENGLISH LANGUAGE ARTS ) a group of three books, plays, or movies that form a settrim / trim / verb ( trims , trim - ming , trimmed )

to cut a small amount off something to make it neat He trimmed my hair. ►trim noun [ count ]

My hair needs a trim.

tri • o / ' triou / noun [ count ] ( plural tri - os ) a group of three people who play music or sing together — Look at quartet .

trip 1 © / trip/ noun

[count]

a visit to a place; an act of traveling We went on a trip to the mountains. How was your trip?

—Look at round-trip .

Thesaurus

trip an act of traveling from one place to another, and usually back again. A trip can be short or long, and can be for business or pleasure: a business trip ♦ a round-the-world trip ♦ a trip to the grocery store ♦ They took a trip down the river. ♦ We just got back from our trip to Japan. We had a great time. travel the general activity of moving from place to place. With this meaning, travel is a noncount noun. A person's travels are the time he or she spends traveling, especially in foreign countries and for pleasure: air/rail/space travel ♦ Foreign travel is very popular these days. ♦ The book is about her travels around Europe.

journey a long and often difficult trip from one place to another: It was a dangerous journey across the mountains. ♦ They continued their journey on foot. expedition a long, organized trip to find out about a place or to do something special: He led the first expedition to the North Pole. ♦ She made two expeditions to Brazil to study the wild plants. voyage a long trip by water or in space: The Titantic sank on its first voyage. ♦ The spacecraft began its voyage to Jupiter.

trip 2 / trip / verb ( rip: , rippirw , ripped)

to hit your foot against something so that you fall or almost fall

She tripped over the step.

trip someone up to make someone fall or almost fall He put out his foot and tripped me up.

tri • ple / ' tripl / adjective

with three parts, happening three times, or containing three times as much as usual

a triple murder (= in which three people were killed ) ►tri • ple verb ( tri - ples , tri - pling , tri - pled )

to become or to make something three times bigger Sales have tripled this year.

tri • umph / ' traiAmf / noun [ count, noncount ]

great success

The race ended in triumph for his team.

tri • um • phant / trai ' Amfant / adjective

very happy because you have won or succeeded at something

► tri • um • phant • ly / trai ' Amfantli / adverb

The winning team ran triumphantly around the stadium.

triv • i • al / ' trivial / adjective

not important

She gets angry about trivial things.

trol • ley / ' trali / noun [ count ] ( plural trol . leys )

an electric bus that runs along metal tracks (called rails ) in the road —SYNONYM streetcar

trom • bone / tram ' boun / noun [ count ]

( MUSIC ) a large musical instrument. You play it by blowing and moving a long tube up and down.

— Look at the picture at instrument .

troop / trup / noun

troops [ plural ] soldiers We sent packages to U.S. troops.