startup

Short definition from Wiktionary

Noun

1. 1
   The act or process of starting a process or machine.
2. 2
   A new company or organization or business venture designed for rapid growth.
3. 3
   A folder (especially in Windows), containing shortcuts of applications or programs that start up automatically after a user signs in.
4. 4
   A kind of high-low or thigh-high boot worn by rustic people.
5. 5
   A kind of gaiter or legging.
6. 6
   One who comes suddenly into notice; an upstart.