direct sum

noun

Definition of direct sum 

First Known Use of direct sum

1908, in the meaning defined above

Keep scrolling for more

Learn More about direct sum

Share direct sum

Statistics for direct sum

Look-up Popularity

Time Traveler for direct sum

The first known use of direct sum was in 1908

See more words from the same year

Comments on direct sum

What made you want to look up direct sum? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

required by fashion, etiquette, or custom

Get Word of the Day daily email!

Test Your Vocabulary

Great Scrabble Words—A Quiz

  • scrabble-tiles-that-read-scrabble-quiz
  • Which of the following Q-without-U words means the number five in cards or dice?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!