The meaning of MIGHT is —used to express permission, liberty, probability, or possibility in the past. How to use might in a sentence. Synonym Discussion of Might . Might | Modal Auxiliary Verb Might is a modal auxiliary verb. It is followed by an infinitive without to. There is no -s in the third person singular. It might rain this evening. Questions and negatives are made without do. We might not be home before evening. Might does not have infinitives or participles. When necessary, we use other words. Meaning Might is used to talk about possibility, and to ask for and give permission. Possibility We often use might to say that there is a chance that ... Learn the difference between the words may and might and how to use each of them correctly in a sentence so your writing always looks polished. Learn the meaning and usage of the modal verb might , which expresses possibility, probability, or politeness in English. Find out how to pronounce, conjugate, and collocate might with other words.