The speaker says that she heard a fly<span> buzz as she lay on her deathbed. The room was as still as the air between “the Heaves” of a storm. The eyes around her had cried themselves out, and the breaths were firming themselves for “that last Onset,” the moment when, metaphorically, “the King / Be witnessed—in the Room—.”</span>
A cliche is a well-worn phrase used in conversation or in writing that has lost it's meaning. It's been overused. For example, "She was frightened to death to pet the pitbull..." "frightened to death" is the cliche.
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