What does the term ‘truth’ mean? What does it mean to ‘believe’ in something?

I am interested to hear what people mean when they talk about something being ‘true’ – is that a relative or objective term? Or can it be both?

What then does it mean to say that you “believe” something to be true? Is that a contradiction in terms?

Your thoughts?

(I am not so much interested as to what ‘your truth’ is – rather how you go about identifying what is ‘truth’ – if it exists)