A large, controlled outdoor fire lit to celebrate something or as a signal.
A fire lit outdoors to burn unwanted items; originally (historical), heretics or other offenders, or banned books; now, generally agricultural or garden waste, or rubbish.
Something like a bonfire (sense 1 or 2) in heat, destructiveness, ferocity, etc.
To destroy (something) by, or as if by, burning on a bonfire; (more generally) to burn or set alight.
To fire (pottery) using a bonfire.
To make, or celebrate around, a bonfire.
An observation tower in which a lookout keeps watch over prisoners, or looks out for fires, etc.