Overcast vs Undercast - What's the difference?

As nouns the difference between overcast and undercast

is that overcast is an outcast while undercast is something viewed from above through another medium, as of clouds viewed from an airplane.

is that overcast is to overthrow while undercast is to allocate the parts in (a play or film) to insufficiently skilled actors.

is covered with clouds; overshadowed; darkened.

(en noun)

(obsolete) An outcast.

A cloud covering all of the sky.

(en adjective)

Covered with clouds; overshadowed; darkened.

(meteorology) The sky is said to be overcast , when it is more than 90% covered by clouds.

(figuratively) In a state of depression; gloomy; melancholy.

(obsolete) To overthrow.

To cover with cloud; to overshadow; to darken.

To make gloomy; to depress.

(obsolete) To be or become cloudy.

(obsolete) To transform.

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(en noun)

Something viewed from above through another medium, as of clouds viewed from an airplane.

To allocate the parts in (a play or film) to insufficiently skilled actors.

To throw under or beneath.

* Noun: Dictionary.com * Verb: Concise Oxford English Dictionary Version 1.0