Language: | Old English |

Origin: | thritig, from thrie 'three' |

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thir‧ty

1HMN the number 30

2## the thirties

[plural] also ** the '30s, the 1930s**TMC the years from 1930 to 1939 :

In the thirties, air travel really began to take off.

her thirtieth birthday

Definition of thirty from the Longman Dictionary of Contemporary English within

the topic NUMBERS

the topic NUMBERS

add
addition
bi-
billion
calculate
constant
D
demi-
division
eight
eleven
equal(a)
equal(v)
even
factor(n)
factor(v)
fifth
fig.
figure
five
four
fourth
gross
hundred
L
M
million
multiple
-nd
negative
nine
No.
nos.
number
O
one
pi
plot
point
positive
product
-rd
root
round
score
second
set
six
square(n)
square(v)
-st
sum
take
ten
thousand
three
tri-
twenty
twice
unit
V
X
zero

Show all entries from Topic: NUMBERS

Show all entries from Topic: NUMBERS