cloud
noun
a visible collection of particles of water or ice suspended in the air, usually at an elevation above the earth's surface.
Used to describe an action that began in the past, has continued continuously, and is still in progress.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
For several reasons, some of which have been clouding the horizon for many years, others crashing up like a thunder-storm.
From People of the Whirlpool by Mabel Osgood Wright