Definition of out:

part of speech: noun

One who or that which is without; opposed to in; a nook or corner; an open space.

part of speech: adverb

On or to the outside; without; not at home; in a state of exhaustion; in a state of extinction; not in office; not in employment; to the end, as, hear me out; without restraint, as, " I dare laugh out"; not in the hands of the owner, as, " the lands are out upon lease"; with parts of clothes torn, as, out at the elbows; incurring loss, as, out of pocket.

part of speech: adjective

Exterior.

part of speech: interjection

Away; begone; prefix, beyond; exceeding; above.