What is a community TLD?
A community TLD is a top level domain that is operated for the benefit of a clearly delineated community. Community TLDs were first introduced as an application type during ICANN's New gTLD Program. According to the program, applicants could apply as a "Community-Based Delegation" and they would be given priority for their TLD if there were to be an auction due to multiple applicants.
An example of a new TLD that was applied for as a community TLD is
Please note that although there were many community TLD applicants, not all were successful as "Community-Based Delegations" due to ICANN's strict requirements for what that meant. All TLDs that might be considered community TLDs are also considered gTLDs.