The act of appearing again following absence(noun)
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Use "reappearance" in a sentence
"The birders say that the falcon reappearance is strong argument against trying to control the pigeon population with birth control-laced grain."
"But she herself returned, carrying a tray: and her reappearance was the signal for a fresh shock ... of recognition, of satisfaction."
"The only ones to show any interest in his reappearance were the children; and the baby had fallen asleep three minutes after meeting his cousin, while ten-year-old Lucy found him a deal less fascinating than household gossip."