to part (usually with little hope of meeting again)
Definitions (粵典–words.hk)
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Definitions (Wiktionary)
verb, euphemistic
to bid farewell; to part (usually with the implication that there is little likelihood of meeting again) (syn.) 死別, 永訣, 永别, 永诀, 長別, 永別, 死别, 长别
A lot of people ask me whether bidding goodbye to youth means old age is near.
Examples (Wiktionary)
Mandarin
一天在论坛上转悠,突然发现一个很特别的帖子,欣然点开一看,原来是一个刚参加完分区联赛的OIer写的“诀别信”。
一天在論壇上轉悠,突然發現一個很特別的帖子,欣然點開一看,原來是一個剛參加完分區聯賽的OIer寫的“訣別信”。
yī tiān zài lùn tán shàng zhuǎn yōu , tū rán fā xiàn yī ge hěn tè bié de tiě zi , xīn rán diǎn kāi yī kàn , yuán lái shì yī ge gāng cān jiā wán fēn qū lián sài de OIer xiě de “ jué bié xìn ” .
I was wandering on the forums one day when I suddenly found a special post. I joyfully opened it, and found that it was a "farewell letter" from an OIer who had just finished a sectional league match.