The power, force, or influence held by a person or group. Physical strength. Strength or ability to do something. See Synonyms at strength. See Regional Note at powerful. Used to indicate a condition or state contrary to fact: She might help if she knew the truth. Used to indicate a possibility or probability that is weaker than may: We might discover a pot of gold at the end of the rainbow. Used to express possibility or probability or permission in the past: She told him yesterday he might not go on the trip. Used to express a higher degree of deference or politeness than may, ought, or should: Might I express my opinion?