n.1 the belief in a superhuman controlling power, esp. in a personal God or gods entitled to obedience and worship.
2 the expression of this in worship.
3 a particular system of faith and worship.
4 life under monastic vows (the way of religion).
5 a thing that one is devoted to (football is their religion).
Phrases and idioms:
freedom of religion the right to follow whatever religion one chooses.
Derivatives:
religionless adj.
Etymology: ME f. AF religiun, OF religion f. L religio -onis obligation, bond, reverence