The Collaborative International Dictionary of English v.0.48:
Diminish \Di*min"ish\, v. t. [imp. & p. p. Diminished; p. pr.
& vb. n. Diminishing.] [Pref. di- (= L. dis-) + minish: cf.
L. diminuere, F. diminuer, OE. diminuen. See Dis-, and
1. To make smaller in any manner; to reduce in bulk or
amount; to lessen; -- opposed to augment or increase.
Not diminish, but rather increase, the debt.
2. To lessen the authority or dignity of; to put down; to
degrade; to abase; to weaken.
This doth nothing diminish their opinion. --Robynson
I will diminish them, that they shall no more rule
over the nations. --Ezek. xxix.
O thou . . . at whose sight all the stars
Hide their diminished heads. --Milton.
3. (Mus.) To make smaller by a half step; to make (an
interval) less than minor; as, a diminished seventh.
4. To take away; to subtract.
Neither shall ye diminish aught from it. --Deut. iv.
Diminished column, one whose upper diameter is less than
Diminished scale, or Diminishing scale, a scale of
gradation used in finding the different points for drawing
the spiral curve of the volute. --Gwilt.
Diminishing rule (Arch.), a board cut with a concave edge,
for fixing the entasis and curvature of a shaft.
Diminishing stile (Arch.), a stile which is narrower in one
part than in another, as in many glazed doors.
Syn: To decrease; lessen; abate; reduce; contract; curtail;
impair; degrade. See Decrease.