Emily Dickinson Lexicon

MIR'ROR, n. [Fr. miroir; Sp. mirar, Corn. miras, to look, L. miror, to admire.]

1. A looking glass; any glass or polished substance that forms images by the reflection of rays of light. In the clear mirror of thy ruling star / I saw, alas! some dread event depend. Pope.
2. A pattern; an exemplar; that on which men ought to fix their eyes; that which gives a true representation, or in which a true image may be seen. O goddess, heavenly bright, / Mirror of grace and majesty divine. Spenser.
3. In architecture, a small oval ornament cut into deep moldings, and separated by wreaths of flowers. Elmes.