verb

• (transitive) To give up or relinquish control of, to surrender or to give oneself over, or to yield to one's emotions.
  "[…] he abandoned himself […] to his favourite vice."
• (transitive) To desist in doing, practicing, following, holding, or adhering to; to turn away from; to permit to lapse; to renounce; to discontinue.
  "In order to grant the rich these pleasures, the social contract is reconfigured. […] The public realm is privatised, the regulations restraining the ultra–wealthy and the companies they control are abandoned, and Edwardian levels of inequality are almost fetishised."
• (transitive) To leave behind; to desert, as in a ship, a position, or a person, typically in response to overwhelming odds or impending dangers; to forsake, in spite of a duty or responsibility.
  "Many baby girls have been abandoned on the streets of Beijing."
• (transitive, obsolete) To subdue; to take control of.

noun

• (obsolete) Abandonment; relinquishment.