Date: | 1100-1200 |

Language: | Old Norse |

Origin: | rot |

| |||||||||

root1 S3 W2 [countable]

1## plant

HBP the part of a plant or tree that grows under the ground and gets water from the soil :

tree roots

These plants produce a number of thin roots.

2## cause of a problem

the main cause of a problem ** be/lie at the root of something** (=be the cause of something)

Allergies are at the root of a lot of health problems.

A competent mechanic should be able to get to the root of the problem (=find out the cause of a problem).

3## origin/main part

the origin or main part of something such as a custom, law, activity etc, from which other things have developed ** be/lie at the root of something**

the liberal economic policies which lie at the root of American power

4## family connection

## somebody's roots

your relation to a place because you were born there, or your family used to live there :

immigrants keeping in touch with their cultural roots

5## put down roots

if you put down roots somewhere, you start to feel that a place is your home and to have relationships with the people there :

Because of her husband's job, they'd moved too often to put down roots anywhere.

6## tooth/hair etc

HBH the part of a tooth, hair etc that connects it to the rest of your body :

She'd pulled some of Kelly's hair out by the roots.

7## take root

a) if an idea, method, activity etc takes root, people begin to accept or believe it, or it begins to have an effect :

Economists believe that economic recovery will begin to take root next year.

b) HBP if a plant takes root, it starts to grow where you have planted it

8## have a (good) root round

British English informal to search for something by moving other things around

9## language

technicalSLG the basic part of a word which shows its main meaning, to which other parts can be added. For example, the word 'coldness' is formed from the root 'cold' and the suffix 'ness' [↪ stem]

10## mathematics

technicalHMN a number that, when multiplied by itself a certain number of times, equals the number that you have :

2 is the fourth root of 16.

11## root and branch

if you destroy or change something root and branch, you get rid of it or change it completely and permanently because it is bad :

a root and branch reform of the electoral system

Definition of root from the Longman Dictionary of Contemporary English within

the topic MATHS

the topic MATHS

angle
arc
area
axis
base
C
calculator
constant
contain
cos
curve
cut
diameter
dimension
domain
equal(a)
equal(v)
express
expression
face
figure
formula
function
graph
grid
log
math
mathematics
matrix
mean
minute
multiply
N
number
parallel
percentage
pi
plane
plus(n)
plus(a)
plus sign
power
proof
ratio
root
scale
section
segment
solid(a)
solid(n)
solution
solve
square(a)
square(n)
square(v)
square(a)
sum
term
value
variable
vector
vertical
volume
work
X

Show all entries from Topic: MATHS

Show all entries from Topic: MATHS