v. i. 1. To blow over, or be subdued. [ R. ] Spenser. [ 1913 Webster ]

2. (Mus.) To force so much wind into a pipe that it produces an overtone, or a note higher than the natural note; thus, the upper octaves of a flute are produced by overblowing. [ 1913 Webster ]

v. t. 1. To blow away; to dissipate by wind, or as by wind. [ 1913 Webster ]

When this cloud of sorrow's overblown. Waller. [ 1913 Webster ]

2. To ascribe an unwarranted importance to. [ PJC ]

3. (Music) To blow into (a wind instrument) too strongly, so as to produce predominantly overtones. [ PJC ]

a. 1. Having been given more publicity than warranted; having had ascribed more importance than was justified; as, an overblown medical discovery. [ PJC ]

3. Bombastic, pretentious, or excessive; as, overblown rhetoric. [ PJC ]