A cloud from which rain is falling or may fall.

A tall, distinctively anvil-shaped thundercloud.

(informal) The temporary inability to think properly, or to remember something

(property law) An encumbrance or claim on a title (ownership) to real property sufficient to interfere with title transfer until the problem has been resolved.

Alternative spelling of thundercloud

A series of points in three-dimensional space that collectively describe the geometry of a physical object.

To become cloudy

(idiomatic) Often in the phrase on cloud nine: a state of bliss, elation or happiness. / (idiomatic, possibly nonstandard) A state of fantastic or impractical dreaming or thinking.

A large cloud of smoke, flame and debris that rises into the sky as a result of a large explosion, especially after a nuclear explosion, characterized by a long shaft rising from the ground into a much-larger or more-spread-out top, reminiscent of a mushroom in shape.

(idiomatic) Whose future is uncertain due to an anticipated threat or change in circumstance. / (idiomatic) Under suspicion; subject to critical inspection.