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Tu

1 American  
Symbol,

  1. (formerly) thulium.

Tu. 2 American  

abbreviation

  1. Tuesday.

t.u. 3 American  

abbreviation

  1. trade union.

T.U. 4 American  

abbreviation

  1. toxic unit.

  2. Trade Union.

  3. Training Unit.

TU British  

abbreviation

  1. trade union

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Nguyen Don Tu, who’d fought in the North Vietnamese army.

From Slate • Apr. 13, 2026

Tu generally prefers carriers over harnesses for safety and security.

From The Wall Street Journal • Mar. 25, 2026

When her best friend got married seven years ago, Tran Tu Linh gave her a gold ring weighing just over 0.1 ounces.

From Barron's • Jan. 30, 2026

Yang married his first wife Chih Li Tu in 1950, with whom he had three children.

From BBC • Oct. 18, 2025

Like most of the kids in my neighborhood, I had no one to look up to or emulate until I meet John Tu.

From "The Freedom Writers Diary" by The Freedom Writers

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.