Crowd sourcing is defined as "for the act of taking tasks traditionally performed by an employee or contractor, and outsourcing them to a group crowd of people or community in the form of an open call." The key here is that the work has to be done by non-employees so a group of librarians from your institution working on a subject guide wiki would not be crowd sourcing, unless you opened the wiki for your users to add resources.
Libraries and crowdsourcing - 6 examples
Crowd sourcing is defined as "for the act of taking tasks traditionally performed by an employee or contractor, and outsourcing them to a group crowd of people or community in the form of an open call." The key here is that the work has to be done by non-employees so a group of librarians from your institution working on a subject guide wiki would not be crowd sourcing, unless you opened the wiki for your users to add resources.