dilate

v. t. [ imp. & p. p. Dilated p. pr. & vb. n. Dilating ] [ L. dilatare; either fr. di- = dis- + latus wide, not the same word as latus, used as p. p. of ferre to bear (see Latitude); or fr. dilatus, used as p. p. of differre to separate (see Delay, Tolerate, Differ, and cf. Dilatory): cf. F. dilater. ] 1. 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. [ 1913 Webster ]

2. To enlarge upon; to relate at large; to tell copiously or diffusely. [ R. ] [ 1913 Webster ]

Do me the favor to dilate at full
What hath befallen of them and thee till now. Shak.

Syn. -- To expand; swell; distend; enlarge; spread out; amplify; expatiate. [ 1913 Webster ]