Question

what is meant by flame

Answer 1

it is product of three components
1.fuel
2.air (oxygen)
3.heat
mixture of these results in combustion . which we can observe in the form of heat energy and light energy.

Answer 2

A hot usually luminous body of burning gas often containing small incandescent particles, typically emanating in flickering streams from burning material or produced by a jet of ignited gas .
It is the mixture of three components fuel,air (oxygen),heat.
In this process energy is released in the form of heat and light also.