freelance

Short definition from Wiktionary

Noun

1. 1
   Someone who sells their services to clients without a long-term employment contract.
2. 2
   A medieval mercenary.

Adjective

1. 1
   Of, or relating to a freelance; without employment contract.

Verb

1. 1
   To work as a freelance.
2. 2
   To produce or sell services as a freelance.