Friday

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. The sixth day of the week.

Century Dictionary and Cyclopedia

1. n. The sixth day of the week. Friday is the Mohammedan sabbath or “day of assembly.” It is said in the Mohammedan traditions to have been established by divine command as a day of worship for Jew and Christian alike, as being the day on which Adam was created and received into Paradise, the day on which he was expelled from it, the day on which he repented, and the day on which he died. It will, according to the same traditions, be the day of the resurrection. In the Roman and Eastern and Anglican churches, all Fridays except Christmas day (when it occurs on Friday) are generally observed as fasts of obligation or days of abstinence, in memory of the crucifixion of Christ. an event which is more especially commemorated annually on Good Friday (see below). In most Christian nations Friday is popularly regarded with superstition, and is considered an unlucky day for beginning any enterprise; to spill more or lees salt on Friday is considered an especially bad omen. Until recently it was common for criminals under sentence of capital punishment to be executed on Friday; hence Friday is sometimes called hangman's day.
2. n. Any Friday marked by a great calamity: with special reference in England to Friday, December 6th, 1745, the day on which news reached London that the young pretender Charles Edward had reached Derby; or to the commercial panic caused by the failure of the house of Overend and Gurney, May 11th, 1866; and in the United States to the sudden financial panic and ruin caused by reckless speculation in gold on the exchange in the city of New York on Friday, September 24th, 1869 ; or to another similar panic there, which began September 18th, 1873.
3. n. Among the Nestorians, the Friday after Whit-Sunday.

Wiktionary

1. n. The sixth day of the week in many religious traditions, and the fifth day of the week in systems using the ISO 8601 norm; the Biblical sixth day of a week, the day before the Sabbath, or "day of preparation" in preparation for the Sabbath; the Islamic sabbath; it follows Thursday and precedes Saturday.
2. adv. on Friday

GNU Webster's 1913

1. n. The sixth day of the week, following Thursday and preceding Saturday.

WordNet 3.0

1. n. the sixth day of the week; the fifth working day