Religion
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 Mohammedans, 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