No, not the punctuation mark—
—the rhetorical technique, which Dictionary.com defines as:
A digression in the form of an address to someone not present, or to a personified object or idea, as “O Death, where is thy sting?”
Keats used this technique in his “Ode on a Grecian Urn,” in which he starts talking to a vase:
Thou still unravished bride of quietness,
Thou foster-child of silence and slow time…
No word on whether the vase found this a little weird.
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