DIM (2)

dim (2). Dim, v.t. to cloud, darken, obscure, overcast

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Dim, v. t. [imp. & p. p. Dimmed (?); p. pr. & vb. n. Dimming.] 1. 1. To render dim, obscure, or dark; to make less bright or distinct; to take away the luster of; to darken; to dull; to obscure; to eclipse.
A king among his courtiers, who dims all his attendants. Dryden. Now set the sun, and twilight dimmed the ways. Cowper. 2. 2. To deprive of distinct vision; to hinder from seeing clearly, either by dazzling or clouding the eyes; to darken the senses or understanding of.
Her starry eyes were dimmed with streaming tears. C. Pitt.