Up*start" (?), v. i. To start or spring up suddenly. Spenser. Tennyson.

Up"start` (?), n. 1. One who has risen suddenly, as from low life to wealth, power, or honor; a parvenu. Bacon.

2. (Bot.) The meadow saffron. Dr. Prior.

Up"start`, a. Suddenly raised to prominence or consequence. "A race of upstart creatures." Milton.

Up*start" (?), v. i. To start or spring up suddenly. Spenser. Tennyson.

Up"start` (?), n. 1. One who has risen suddenly, as from low life to wealth, power, or honor; a parvenu. Bacon.

2. (Bot.) The meadow saffron. Dr. Prior.

Up"start`, a. Suddenly raised to prominence or consequence. "A race of upstart creatures." Milton.

• someone who has gained sudden wealth, power or influence, but has either not gained social acceptance or has become arrogant or presumptuous
  
• self-important and presumtuous