Crowdsourcing is the process of reuniting a group of people with a common interest around a specific subject related to that interest. This group of people will be a crucial part on the development of the subject, since it will be their input that helps with the definition of the subject itself.
Oxforddictionaries.com puts it like this:
Crowdsourcing – “Obtain (information or input into a particular task or project) by enlisting the services of a number of people, either paid or unpaid, typically via the Internet: «she crowdsourced advice on album art and even posted an early version of the song so fans could vote for their favorite chorus»” Continue reading