open-source

Definition of Open-source in English :

1. open-source

of or relating to or being computer software for which the source code is freely available

WordNet Lexical Database for English. Princeton University. 2010.

Open-source

noun

a.

intellectual property, esp computer source code, that is made freely available to the general public by its creators

b.

(as modifier)

open source software

Compare closed source

adjective

designating or of software whose code is made public and which is thus available to any programmer to develop and customize

adj.

Open to public participation, as in the sharing of information or the development of software: an open-source operating system.