プログレッシブ和英中辞典(第4版)の解説
にゅうかい【入会】
admission
入会する join ((a club))；become a member ((of a club))
クラブに入会を申し込む
apply for 「admission to [membership in] a club
協会に入会を許される
be 「admitted to [enrolled in] a society／be admitted to membership in a society
だれでも入会できます
Membership is open to all.／Everybody is welcome to join (the club).
入会金
an entrance [enrol(l)ment, admission] fee; a fee for new members
入会者
a new member ((of a club))