adjective
Definition: Suitable or appropriate for a particular purpose, often in a way that is self-interested or pragmatic rather than principled.
Example: It may not be the best solution, but it is the most expedient one given the circumstances.
noun
Definition: A method or tool used to achieve a specific goal, especially in a quick or temporary way.
Example: Using a plastic bag as a rain cover was an expedient solution during the sudden downpour.