to leave completely and finally; forsake utterly; desert

to abandon one's farm; to abandon a child; to abandon a sinking ship.

to give up; discontinue; withdraw from

to abandon a research project; to abandon hopes for a stage career.

to give up the control of

to abandon a city to an enemy army.

to yield (oneself) without restraint or moderation; give (oneself) over to natural impulses, usually without self-control

to abandon oneself to grief.

Law . to cast away, leave, or desert, as property or a child.

Insurance . to relinquish (insured property) to the underwriter in case of partial loss, thus enabling the insured to claim a total loss.

Obsolete . to banish.