2 Samuel 12:20 Then David arose from the earth, and washed, and anointed himself, and changed his apparel, and came into the house of the LORD, and worshipped: then he came to his own house; and when he required, they set bread before him, and he did eat.
2 Samuel 15:32 And it came to pass, that when David was come to the top of the mount, where he worshipped God, behold, Hushai the Archite came to meet him with his coat rent, and earth upon his head:
Worship is showing reverence. That is expressed by kneeling or prostrating oneself. It is the feeling of great adoration. Worship is trust, love, loyalty, and dependence.
Do you recognize your need of God? Do you trust Him because He is so great you can trust Him? Do you depend on Him?