When you talk about the seventies, you are referring to numbers between 70 and 79. For example, if you are in your seventies, you are aged between 70 and 79. If the temperature is in the seventies, it is between 70 and 79.
It's a long way to go for two people in their seventies.
3. plural noun
The seventies is the decade between 1970 and 1979.
In the late Seventies, things had to be new, modern, revolutionary.
seventy in British English
(ˈsɛvəntɪ)
nounWord forms: plural-ties
1.
the cardinal number that is the product of ten and seven
See also number (sense 1)
2.
a numeral, 70, LXX, etc, representing this number
3. (plural)
the numbers 70–79, esp the 70th to the 79th year of a person's life or of a particular century
she continued to work into her seventies
temperatures in the high seventies
4.
the amount or quantity that is seven times as big as ten
5.
something represented by, representing, or consisting of 70 units
determiner
6.
a.
amounting to seventy
the seventy varieties of fabric
b.
(as pronoun)
to invite seventy to the wedding
Word origin
Old English seofentig
seventy in American English
(ˈsɛvənti; often, ˈsɛvəndi)
adjective
1.
seven times ten
nounWord forms: pluralˈseventies
2.
the cardinal number between sixty-nine and seventy-one; 70; LXX
Idioms:
the seventies
Word origin
ME seofentig < OE (hund)seofontig: see seven & -ty2
Examples of 'seventy' in a sentence
seventy
We signed him out of Holy Cross in seventy, I think it was.
Tapply, William G FOLLOW THE SHARKS (1989)
She leant forward then, her face serious and showing all of her seventy years.
Meek, M R D IN REMEMBRANCE OF ROSE (1989)
She does have a cousin, her only remaining relative, but he's seventy and bedridden.
Forbes, Bryan THE ENDLESS GAME (1989)
They had passed Chinle now, Leaphorn driving the white carryall at a steady seventy.