seventy Meaning, Definition & Usage

  1. noun the cardinal number that is the product of ten and seven
    LXX; 70.
  2. adjective satellite being ten more than sixty
    lxx; 70.

WordNet

Sev"en*ty adjective
Etymology
AS. hund-seofontig. See Seven, and Ten, and cf. Seventeen, Sixty.
Definitions
  1. Seven times ten; one more than sixty-nine.
Sev"en*ty noun
Wordforms
plural Seventies
Definitions
  1. The sum of seven times ten; seventy units or objects.
  2. A symbol representing seventy units, as 70, or lxx.

Webster 1913