Dictionary.com
Thesaurus.com

Christmas tree

American  

noun

  1. an evergreen tree decorated at Christmas with ornaments and lights.

  2. a control board or panel containing a variety of colored lights for indicating the status of various functions, elements, components, etc.

  3. an elaborate arrangement of pipes, valves, etc., as for controlling the flow of oil or gas.


Christmas tree British  

noun

  1. an evergreen tree or an imitation of one, decorated as part of Christmas celebrations

  2. Also called: Christmas bush.  any of various trees or shrubs flowering at Christmas and used for decoration

  3. another name for pohutukawa

"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

Etymology

Origin of Christmas tree

An Americanism dating back to 1780–90

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.

Over the next few weeks, he expects to take back to stores a lot of fake Christmas trees and ornaments, along with unwanted presents from in-laws and clothes in aspirational sizes.

From The Wall Street Journal

In recent weeks, the 63-year-old leftist has been dancing on stage at rallies, calmly strolling trade expos and attending Christmas tree lightings hand-in-hand with his wife.

From The Wall Street Journal

The few trees that had survived the fire now looked like Christmas trees planted on top of telephone poles.

From Los Angeles Times

Chester Thigpen, who owned a Christmas tree farm, was the face of this movement.

From Salon

Travis Head – 6 – Started the week on the front of the Herald Sun, pictured with his family in front of a Christmas tree.

From BBC