Tu

¹ American

Symbol,

(formerly) thulium.

Tu. ² American

abbreviation

Tuesday.

t.u. ³ American

abbreviation

trade union.

T.U. ⁴ American

abbreviation

toxic unit.
Trade Union.
Training Unit.

TU British

abbreviation

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.

Tu replied, “That may be so, but it is also irrelevant.”

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

Earlier, British top seeds Julian Cash and Lloyd Glasspool suffered a shock second-round defeat by Australian wildcards James McCabe and Li Tu in the men's doubles.

From BBC • Jan. 23, 2026

John Tu was the first to pledge his support.

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