(1)善意（特に会議での）の承認または表現力
(2)an acknowledgment or expression of good will (especially on meeting)
(3)(usually plural) an acknowledgment or expression of good will (especially on meeting)
さらに詳しく
(1)挨拶を送る
(2)人に会うときに挨拶を表現する
(3)send greetings to
(4)express greetings upon meeting someone
