[n. of action f. L. acūminā-re to sharpen; as if ad. L. *acūminātiōn-em; see -ATION.]
1. The action of sharpening or bringing to a point; the giving point to. lit. and fig.
1837. Whewell, Induct. Sc., III. XV. i. 197. Truncation, acuation and acumination, or replacement by a plane, an edge, a point respectively.
1879. Cornh. Mag., Dec., 689. The acumination consisting mainly in a more frequent and sarcastic repetition of the unfortunate Mr. Disraeli’s titles and distinctions.
2. The product of sharpening or giving point; a tapering point.
1659. Pearson, Creed (1839), 270. The coronary thorns … did also pierce his tender and sacred temples to a multiplicity of pains, by their numerous acuminations.
1804. Jameson, Mineral., I. 213. The extremity of the acumination is often truncated.
3. A tending towards a point.
1856. Carlyle, Remin. (1881), I. 183. Steadily denied acumination or definite consistency and direction to a point.
