A registry mark given by underwriters (as at Lloyd's) to ships in first-class condition. Inferior grades are indicated by A 2 and A 3. [ 1913 Webster ]
A 1 is also applied colloquially to other things to imply superiority; prime; first-class; first-rate. [ 1913 Webster ]
[wankoin](adj-f) one-coin (i.e. able to be paid for with only one coin, esp. a 500-yen coin, sometimes a 100-yen coin); costing 500 yen; costing 100 yen[Add to Longdo]
[かどばん, kadoban](n) (1) make-or-break game in a go or shogi tournament; (2) ozeki-ranked sumo wrestler being in danger of losing his rank if he fails to win 8 or more bouts in a 15-day tournament[Add to Longdo]
[せんばんにいちばんのかねあい, senbanniichibannokaneai](exp) (obsc) something so difficult that one doesn't know if there's even a 1 in 1000 chance of success[Add to Longdo]
[あしながおじさん, ashinagaojisan](n) (1) (See 大蚊) anonymous scholarship system for orphans whose parents have been killed in traffic accidents (from Daddy-Long-Legs, a 1912 novel by Jean Webster); (2) harvestman; daddy longlegs (arachnid of order Opiliones)[Add to Longdo]
[ひゃくマスけいさん(百マス計算);ひゃくますけいさん(百ます計算), hyaku masu keisan ( hyaku masu keisan ); hyakumasukeisan ( hyaku masu keisan )](n) method of learning through repetition conceived by Kageyama Hideo, which involves multiplying and other calculations carried out on a 10-by-10 grid of numbers (lit[Add to Longdo]