(nautical) Having seven masts.

Of an electronic device or display: consisting of three horizontal and four vertical lines, in an arrangement similar to the shape of the number 8, that may be individually shown or hidden, usually for the display of numeric digits; or consisting of a set of these arrangements.

24 hours per day, seven days per week. Designates a round-the-clock service, typically including holidays, as might be offered by a supermarket, ATM, gas station, concierge service or manned data center.

(folklore, fairy tale) A pair of boots enabling the wearer to cross seven leagues at one stride.

(Catholicism) The cardinal sins enumerated by Thomas Aquinas in the 13th century: pride (or vanity), envy, gluttony, greed (or avarice), lust, sloth, and wrath (or anger).

A teenagers' party game in which two participants are shut in a closet for seven minutes, giving them the opportunity to kiss etc.

(poker) A version of stud poker where each individual receives seven cards, three face down and four face up.

(poker) A version of lowball poker where the ace is the high card and straights and flushes count, making the best hand 2-3-4-5-7 (with at least two different suits).

In Germany, June 27 is Siebenschläfertag (Seven Sleepers Day). The weather on that day is supposed to determine the average weather of the next seven weeks.

Seven Wonders of the Ancient World / New Seven Wonders of the World