If a plan, idea, or method is feasible, you can actually do it, and it is likely to work — not only in a dream, but with the time, money, and tools you have. It is a formal word. Teachers, bosses, and reports use it a lot. Feasible does not mean easy. Climbing a mountain in winter may be feasible for a skilled team, but it is still hard. If something cannot work in real life, it is not feasible (people also say unfeasible or impractical).