Final answer:
A "Name Sign" or "Personal Sign" is a unique identifier used within the Deaf community to identify individuals who have shown a deep commitment to the community, reflecting a characteristic or personal story.
Step-by-step explanation:
The term that refers to a unique sign that acts as a personal identifier for one person in particular and is earned by participating in the Deaf community for a very long time is known as a "Name Sign" or "Personal Sign." In Deaf culture, this is a sign that is typically given by another Deaf individual and is used within the community to identify a person in a respectful and culturally meaningful way. Often, a Name Sign is based on a characteristic or a personal story relevant to that individual and is a deep sign of acceptance and belonging within the Deaf community.