Letters that make big top
o, b, g, p, t, i are letters that make 'big top'
1 possible definitions for 'big top'
Under this definition, big top is a noun and has the following properties:
circus tent, round top, top have the same meaning as 'big top'
'big top' can be a type of canvas tent, canvas, canvass.
'big top' can be a part of circus.
"he was afraid of a fire in the circus tent", "they had the big top up in less than an hour"