The definition that would most clearly fit the word approbation would be best fit
Answer:
<em>The altitude of the cloud cover is called the</em> ceiling <em>in</em> aviation<em>; it is an important measurement for those piloting small planes.</em> As for the other question, I only know that the second part is international.
Explanation:
ceiling: the upper inside limit of a room; also the height above the ground of the lowest clouds.
aviation: the operation of aircraft.
international: beyond the boundaries of a single nation.
