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.

He noticed how people went to the rail yard in December and bought Christmas trees off boxcars, so fresh they still had ice clinging to their branches.

From Los Angeles Times

“And then Emerald would come up with a platter of jewels and start decorating me like a Christmas tree.”

From Los Angeles Times

“It’s kind of like decorating a Christmas tree,” Glory said.

From Literature

We didn’t have a Christmas tree, but we’d made paper chains in school, and Ma dug out our wispy old tinsel garlands.

From Literature

Christmas trees still strung with lights brighten apartments during power cuts.

From The Wall Street Journal