Q 13: What is Islam?
A--- Islam means perfect submission and subjection to Allah; and testifying complete Monotheism and freedom from polytheism and disobedience to Him.
Allah, Most High says: {And who can be better in religion than one who submits his fate (himself) to Allah}. (AnNisa', 125)
He says: {And whosoever submits his face (himself) to Allah, while he is a Muhsin, then he has grasped the most trustworthy handhold}. (Luqman, 22)
He says: {And your Ilah (god) is One Ilah (God -Allah), so you must submit to Him Alone (in Islam). And (O Muhammad) give glad tidings to the Mukhbitun}. (Al-Hajj, 34)
Reference: 200 FAQ On Muslims Belief - Shiekh Hafiz Ibn Ahmed Al Hakami