Propound Definition: To offer a document as being authentic or valid. To offer or propose a document as being authentic or valid. Used mostly in the law of wills; to propound a will means to take legal action to have it authenticated, as part of probate, including a formal inspection of the will, by the court. Find you are constantly looking up definitions? Try our search provider (works in most modern browsers) If you find an error or omission in Duhaime's Legal Dictionary, or if you have legal term suggestion, we'd love to hear from you!