v.1. To relinquish possession or control of something to someone or something because of demand or compulsion: The commander surrendered the valley to the opposing forces.
2. To submit to the control or authority of someone or something: The army surrendered to the enemy after they lost the key battle. I hope the suspect surrenders to the police soon.
3. To give over or resign oneself, as to an emotion. Used reflexively: When I lost my parents, I surrendered myself to grief.