1. Software that is owned by a company or individual and whose source code is not freely available to the public; the opposite of open-source software
Microsoft Windows is a proprietary program that cannot be freely modified by users.
O Microsoft Windows é um programa proprietário que não pode ser livremente modificado pelos usuários.
2. Commercial software distributed under a restrictive license that limits user rights such as copying, modification, or redistribution
Many companies prefer proprietary programs because they provide dedicated customer support.
Muitas empresas preferem programas proprietários porque oferecem suporte dedicado ao cliente.