AskDefine | Define seven

Dictionary Definition

seven adj : being one more than six [syn: 7, vii] n : the cardinal number that is the sum of six and one [syn: 7, VII, sevener, heptad, septet]

User Contributed Dictionary

English

Pronunciation

  • /ˈsɛvən/, /"sEv@n/
  • Rhymes with: -ɛvən

Etymology

seofon, from , from .

Number

  1. The cardinal number occurring after six and before eight. Ordinal: seventh.
  2. Describing a set or group with seven components.

Translations

cardinal number
set or group with seven components
  • Lithuanian: septyneri, septynerios

Noun

  1. The digit/figure 7 or an occurrence thereof.
  2. countable cards A card bearing seven pips.

Translations

the figure seven
a card bearing seven pips
  • Danish: syver
  • Finnish: seiska
  • Hungarian: hetes
  • Russian: семёрка

Breton

Adjective

  1. courteous

Extensive Definition

'' 7 (seven) is the natural number following 6 and preceding 8.

In mathematics

In numeral systems

In quaternary, 7 is the smallest prime with a composite sum of digits.
In the English language, 7 is the only 2-syllable natural, positive 1-digit number

List of basic calculations

Evolution of the glyph

In the beginning, various Hindus wrote 7 more or less in one stroke as a curve that looks like an uppercase J upside down. The western Ghubar Arabs' main contribution was to make the longer line diagonal rather than straight, though they showed some tendencies to making the character more rectilinear. The eastern Arabs developed the character from a 6-look-alike into an uppercase V-look-alike. Both modern Arab forms influenced the European form, a two-stroke character consisting of a horizontal upper line joined at its right to a line going down to the bottom left corner, a line that is slightly curved in some font variants. As is the case with the European glyph, the Cham and Khmer glyph for 7 also evolved to look like their glyph for 1, though in a different way, so they were also concerned with making their 7 more different. For the Khmer this often involved adding a horizontal line above the glyph. This is analogous to the horizontal stroke through the middle that is sometimes used in handwriting in the Western world but which is almost never used in computer fonts. This horizontal stroke is, however, important to distinguish the glyph for seven from the glyph for one in writings that use a long upstroke in the glyph for one.
On the seven-segment displays of pocket calculators and digital watches, 7 is the number with the most common glyph variation (0, 6 and 9 also have variant glyphs). Most calculators use three line segments, but on Sharp, Casio, and a few other brands of calculators, 7 is written with four line segments. The reason is that in Japan & Korea 7 is written as ① in the illustration to the right.
While the shape of the 7 character has an ascender in most modern typefaces, in typefaces with text figures the character usually has a descender, as, for example, in

In science

  • The number of spots on a common ladybug.
  • With very few exceptions, all mammals' necks have seven bones.
  • ROY G. BIV = red, orange, yellow, green, blue, indigo, and violet were originally named as the seven colors of the rainbow, though blue and indigo are considered by some to be the same color.

Chemistry

Astronomy

In technology

In religion

  • In Judaism:
    • A highly symbolic number in the Torah, alluding to the infusion of spirituality and Godliness into the Creation. For example:
    1. God rested on and sanctified the seventh day (Shabbat).
    2. A seven-day purification period is required for one who has become tamei to become tahor.
    3. The Shmita (Sabbatical) year arrives every seventh year.
    4. The Jubilee (Yovel) year comes after 7 times 7 years.
    5. The Counting of the Omer leading up to the Giving of the Torah is expressed as "7 times 7 weeks."
    6. There are 7 days of Passover and Sukkot when celebrated in Israel.
    7. Shiv`a (another pronunciation of the Hebrew word for 7 -- ()), is the number of days of mourning. Hence, one sits Shiva. As in Shiva (Judaism)
    • The weekly Torah portion is divided into seven aliyahs, and seven men or boys over the age of 13 are called up for the reading of these aliyahs during Shabbat morning services.
    • Seven blessings are recited under the chuppah during a Jewish wedding ceremony.
    • A Jewish bride and groom are feted with seven days of festive meals after their wedding, known as Sheva Berachot ("Seven Blessings").
    • The number of Ushpizzin (also known as the "Seven Shepherds") who visit the sukkah during the holiday of Sukkot: Abraham, Isaac, Jacob, Joseph, Moses, Aaron, and David.
    • The number of nations God told the Israelites they would displace when they entered the land of Israel (Deut. 7:1): the Hittite, the Girgashite, the Amorite, the Canaanite, the Perizzite, the Hivite, and the Jebusite.
    • In Breslov tradition, the seven orifices of the face (2 eyes, 2 nostrils, 2 ears, and the mouth) are called "The Seven Candles."
    • The menorah (Hebrew: מנורה), is a seven branched candelabrum lit by olive oil in the Tabernacle and the Temple in Jerusalem. The menorah is one of the oldest symbols of the Jewish people. It is said to symbolize the burning bush as seen by Moses on Mount Sinai (Exodus 25).
    • The number of times Cain will be avenged by God if he is murdered (Gen 4:15).
    • The Israelites circled Jericho for 7 days and then the wall tumbled down.
    • Yahweh or Jehovah is the divine name, whose letters' placed alphabetically equal 70, a product of the divine number 7.
  • In Islam:
    • The number of ayat in surat al-Fatiha.
    • The number of heavens in Islamic tradition.
    • The number of Earths in Islamic tradition.
    • The number of circumambulations (Tawaf) that are made around the Kaaba
    • The number of walks
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