intransitive verb
Definition: To become covered with clouds or to become less clear.
Example: As the day went on, the sky clouded, and it started to rain.
noun
Definition: A visible mass of tiny water droplets or ice particles in the sky, often appearing white or gray, that can bring rain or snow.
Example: The sky was filled with fluffy white clouds on that sunny day.
transitive verb
Definition: To cover something with clouds or to make it unclear or difficult to see.
Example: The smoke clouded the view of the mountains.