noun🔗Shareメインマスト、大檣The chief, and tallest mast of a sailing ship that has more than one mast."The sailor climbed the mainmast to get a better view of the approaching storm. "船乗りは、近づいてくる嵐をよりよく見るために、メインマストに登った。nauticalsailingvehicletechnicalChat with AIVocabulary GamePractice Reading