キイ

(1)something crucial for explaining; "the key to development is economic integration"

(2)説明するために重要な何か

(3)any of 24 major or minor diatonic scales that provide the tonal framework for a piece of music

(4)音楽の一節に対する全枠組みを提供する24の長調または短調の全音階のどれか

(5)a slight indication

(6)わずかな暗示

(7)evidence that helps to solve a problem

(8)問題を解く助けになる証拠

(9)metal device shaped in such a way that when it is inserted into the appropriate lock the lock's mechanism can be rotated

(10)錠に差し込んだとき錠前のメカニズムが回転するように型取られた金属器具