A feasible solution where the objective function reaches the maximum or minimum value.

optimal solution is the best solution you can find in a feasible region wherein you reach the maximum or the minimum value

When the goal function hits its maximum or minimum value, this is a viable option.

Optimal solution is a feasible solution where the objective function is to reach its maximum or minimum value.

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Optimal solution is a feasible solution where the objective function is to reach its maximum or minimum value

The best practicable solution that maximizes or minimizes the value of the objective function while satisfying all stated constraints is referred to as an optimal solution.

Optimal solution is the best objective function.

Optimal solutions refer to the best possible solutions that satisfy all the constraints and maximize or minimize the objective function in a given optimization problem. 

It is the best and nearest perfect solution in feasible region