by your leave noun 1prepositional phrase 1forms 2 noun1 •Request for permission.The natives have gathered on the top of every grave mound near by and though many resent the riding over their fields without a so much as a 'By your leave' […] — 1897 prepositional phrase1 •With your permission.Sir I weare my weapon for mine owne defence, And by your leaue will weare it yet a while. — 1593 formsby your leaves · by-your-leaves