After placing the little creature with its mother, he stood and carefully examined the sky, to ascertain the time of night from the altitudes of the stars.
The sill was three or four feet above the ground, and for a moment one was at a loss for an explanation of this exceptional altitude, till ruts immediately beneath suggested that the door was used solely for the passage of articles and persons to and from the level of a vehicle standing on the outside.
There are no more uses of "altitude" in the book.
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The altitude gave her a headache.
Denver is called the Mile High City because of its altitude (1 mile above sea level).