■ cardinal number
1》 equivalent to the sum of three and four; one more than six, or three less than ten; 7. (Roman numeral: vii or VII .)
2》 ( ~s ) ~-a-side rugby.
Phrases
the ~ deadly sins (in Christian tradition) the sins of pride, covetousness, lust, anger, gluttony, envy, and sloth.
the ~ seas all the oceans of the world (conventionally the Arctic, Antarctic, North Pacific, South Pacific, North Atlantic, South Atlantic, and Indian oceans).
the Seven Wonders of the World the ~ most spectacular man-made structures of the ancient world.
the ~-year itch a supposed tendency to infidelity after ~ years of marriage.
Derivatives
~fold adjective & adverb
Origin
OE seofon , of Gmc origin.