Surrendering means, "Surrendering the mind to Lord Krishna by thinking only about Him and by serving Him. The natural state of the mind is to think of Krishna".
Surrender simply means keeping God’s will before our own.
A Devotee hears transcendental knowledge with complete willingness to surrender to that knowledge.
Surrender means surrender of your ego.
Surrender fully unto the lotus feet of the Lord. That is the only business of the perfect human being.
Srimad Bhagavatam 1.5.20,