The first time or initial occurrence (e.g., first session, first screening, inaugural attempt).
初回は無料でお試しいただけます。
The first session is free to try.
映画は初回の上映で満席になった。
The film was sold out at the first screening.
初回の提出物は全員が合格した。
Everyone passed the first submission.
Used to mean 'first' or 'initial' in phrases like 'the first ~'; denotes the initial stage of something.
初回の参加者には記念品を配ります。
We will give souvenirs to first-time participants.
初回の打ち合わせで方針を決めた。
We decided the policy at the initial meeting.