is,

"...Godliness or real piety in practice, consisting in the performance of all known duties to God and our fellow men, in obedience to divine command, or from love to God and His law."
Webster's 1828

But whoso looketh into the perfect law of liberty, and continueth therein, he being not a forgetful hearer, but a doer of the work, this man shall be blessed in his deed. If any man among you seem to be religious, and bridleth not his tongue, but deceiveth his own heart, this man's religion is vain. Pure religion and undefiled before God and the Father is this, To visit the fatherless and widows in their affliction, and to keep himself unspotted from the world.
James 1:25-27

Religion, in its most comprehensive sense, includes a belief in the being and perfections of God, in the revelation of His will to man, in man's obligation to obey His commands, in a state of reward and punishment, and in man's accountableness to God; and also true godliness or piety of life, with the practice of all moral duties...
Webster's 1828

Let us with caution indulge the supposition, that morality can be maintained without religion.
George Washington

Religion is also...
Any system of faith and worship. In this sense, religion comprehends the belief and worship of pagans and Mohammendans, as well as of Christians; any religion consisting in the belief of a superior power or powers governing the world, and in the worship of such power or powers. Thus we speak of the religion of the Turks, of the Hindoos, of the Indians, etc., as well as of the Christian religion. We speak of false religion, as well as of true religion.
Webster's 1828