a popular/common/widespread belief
He asked her in the belief that she would lend him the money.
It is my personal belief that the public have a right to know.
She took this medicine in the mistaken belief that it would cure her.
At this time, tango was considered an immoral type of music; but Carlos Gardel changed this belief, [and] people from all over the world loved him. (First Certificate in English; B2; Spanish)
He made no secret of his belief that she would recover.
philosophical beliefs
All nonviolent religious and political beliefs should be respected equally.
We get to know the beliefs, superstitions or the principles of other religious denominations. (First Certificate in English; B2; Polish)
a belief in social justice
With our hectic lifestyles and complacent belief in modern medical sciences we may forget about the importance of proper eating. (Certificate of Proficiency in English; C2; Hungarian)