testamentary : Idioms & Phrases
Letters testamentary
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noun a legal document from a probate court or court officer informing you of your appointment as executor of a will and empowering you to discharge those responsibilities
WordNet
(Law) , an instrument granted by the proper officer to an executor after probate of a will, authorizing him to act as executor.
Webster 1913
testamentary trust
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noun a trust that is created under a will and that becomes active after the grantor dies
