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Meanings
1
circular letter; circulating document
Refers to a document or letter circulated among a group, often for official or organizational communication.
The neighborhood association's circular letter informed us of next month's cleaning duty.
A circular was circulated to all employees from the company.
2
palindrome
A word, phrase, or sequence that reads the same forwards and backwards, e.g., しんぶんし (新聞紙).
"Takeyabu yaketa" (the bamboo grove burned) is a famous palindrome.