This is the 317th most frequent Japanese word.
会員
"Member" or "membership."
In this sentence, 会員 refers to a person who is a member of a group, organization, or association.
新しい会員が加わりました。
A new member has joined.
The term 会員 in this context refers to someone who possesses and can identify as a member via a membership card.
会員カードを提示してください。
Please show your membership card.
Here, 会員 specifies those individuals granted access or privileges within a particular service or community.