会員|かいいんkaiin[0]heiban (flat)

1. nounmember; the membership
   会員かいいんは５人にんに減へった。↗

   The number of members decreased to five.

• SynonymメンバーNeutralNeutral loanword for a member or lineup, as in 「チームのメンバー」; broader in use than 「会員」, covering team members and groups generally.
• Synonym成員せいいんWrittenWritten/formal prose word for the people who make up an organization, as in 「社会の成員」; leans sociological and is not limited to membership-based groups.
• Antonym非会員ひかいいんNeutralThe opposite of 「会員」: someone who does not belong to the organization, as in 「非会員価格」.

Default to 「会員」 for a member of a club or organization. Use 「メンバー」 for team or group members generally, 「成員」 in written, sociological contexts, and 「非会員」 for non-members.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 会かいやクラブなどの組織そしきを構成こうせいする者もの。