(1):
(v. t.) To enlarge upon; to relate at large; to tell copiously or diffusely.
(2):
(v. t.) To expand; to distend; to enlarge or extend in all directions; to swell; - opposed to contract; as, the air dilates the lungs; air is dilated by increase of heat.
(3):
(v. i.) To grow wide; to expand; to swell or extend in all directions.
(4):
(a.) Extensive; expanded.
(5):
(v. i.) To speak largely and copiously; to dwell in narration; to enlarge; - with on or upon.