1. supplied with a vent or vents for intake of air or discharge of gases;
The Collaborative International Dictionary of English v.0.48:
Vent \Vent\, v. t. [imp. & p. p. Vented; p. pr. & vb. n.
1. To let out at a vent, or small aperture; to give passage
or outlet to.
2. To suffer to escape from confinement; to let out; to
utter; to pour forth; as, to vent passion or complaint.
The queen of heaven did thus her fury vent.
3. To utter; to report; to publish. [Obs.]
By mixing somewhat true to vent more lies. --Milton.
Thou hast framed and vented very curious orations.
4. To scent, as a hound. [Obs.] --Turbervile.
5. To furnish with a vent; to make a vent in; as, to vent. a
WordNet (r) 3.0 (2006):
adj 1: supplied with a vent or vents for intake of air or
discharge of gases