Look up celerity or celeritas in Wiktionary, the free dictionary.

Celerity, or celeritas (Latin), may refer to:

• Speed, quickness

Science and technology

• Speed of light, celeritas
• Celerity BBS, a computer bulletin board system popular in the 1990s
• Celerity Computing Inc., defunct San Diego, California vendor
• Celerity IT, a Virginia-based web development consulting group
• Phase velocity, speed of propagation of a wave
• Proper velocity, an alternative way of measuring motion in relativity

Transport

• USS Celeritas (SP-665), a United States Navy patrol vessel
• Mirage Celerity, an American two-seat cabin monoplane
• Celerity (carriage)

Sport

• FC Celeritas Straßburg
• Feyenoord, a Dutch football club in Rotterdam, known as Celeritas 1909–1912
• Celeritas, a Dutch football club in Kampen, active in 1893; see Jasper Warner § Local sports
• Celeritas, a Dutch football club in Rotterdam, active in 1901; see Belgium vs Netherlands Cups § History