root - definition in the American English Dictionary - Cambridge Dictionaries Online

Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “root”

See all translations

root

noun  us   /rut, rʊt/

root noun (PLANT PART)

[C] biology the part of a plant which grows down into the earth [C] biology The root of a hair, tooth, or nail is the part of it that is inside the body.

root noun (ORIGIN)

[C] the origin or source of something: We must get to the root of this problem.

root noun (WORD)

[C] the basic form of a word, to which prefixes or endings can be added: The root of the word "sitting" is "sit."

root noun (number)

algebra a number that is the solution of an equation (= mathematical statement)
rooted
adjective [not gradable]  us   /ˈrut̬·əd, ˈrʊt̬-/
deeply rooted loyalty

root

verb [I/T]  us   /rut, rʊt/

root verb [I/T] (PLANT PART)

(of a plant) to develop roots and begin to grow
(Definition of root from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of root?
Add Cambridge dictionaries to your browser to your website

Definitions of “root” in other dictionaries

Word of the Day

paradox

a situation or statement that seems impossible or is difficult to understand because it contains two opposite facts or characteristics

Word of the Day

What’s All The Commotion About? (Words to describe sounds)

by Kate Woodford,
May 20, 2015
​​​ In this post we look at a range of words and phrases that we use to describe noise and the absence of noise. Starting with complete quiet, we sometimes use the noun hush to describe silence: A hush fell over the room as the bride walked in./There was a deathly hush (=complete

Read More 

plyscraper noun

May 18, 2015
a skyscraper made mainly from wood The development of engineered timber could herald a new era of eco-friendly ‘plyscrapers’. Christchurch welcomed its first multistorey timber structure this year, there are plans for Vancouver, and the talk is China could follow

Read More