Webster's Revised Unabridged Dictionary · 1913

Seven

Seven , adjective

[Old English seven, seoven, seofen, Anglo-Saxon seofon, seofan, seofen; akin to Dutch zeven, Old Saxon, Gothic, & Old High German sibun, German sieben, Icelandic sjau, sjo, Swedish sju, Danish syv, Lithuanian septyni, Russ. seme, Welsh saith, Gael. seachd, Ir. seacht, Latin septem, Greek {not transcribed}, Sanskrit saptan. r305. Compare Hebdomad, Heptagon, September.]

One more than six; six and one added; as, seven days make one week.
Collocations (5)
Seven sciences , See the Note under Science, n., 4.
Seven stars (Astronomy) , the Pleiades.
Seven wonders of the world , See under Wonders.
Seven-year apple (Botany) , a rubiaceous shrub (Genipa clusiifolia) growing in the West Indies; also, its edible fruit.
Seven-year vine (Botany) , a tropical climbing plant (Ipomoa tuberosa) related to the morning-glory.

Seven , noun

1.
The number greater by one than six; seven units or objects.
Of every beast, and bird, and insect small, Game sevens and pairs. — Milton
2.
A symbol representing seven units, as 7, or vii.