告别 (gào bié) literally means 'to tell apart' — 告 ('to tell, to announce') combined with 别 ('to part, to separate'). Together, they form a formal and heartfelt verb meaning 'to bid farewell' or 'to say goodbye', often implying emotional weight, finality, or respect. It’s commonly used in contexts like leaving a place, ending a relationship, parting with someone for an extended time, or even metaphorically saying goodbye to a phase of life (e.g., childhood, a job, or a habit).

Unlike casual farewells like 再见 (zài jiàn), 告别 carries a more solemn, intentional tone — frequently appearing in speeches, letters, ceremonies, or literary expressions. It can function transitively (e.g., 告别朋友) or intransitively (e.g., 与过去告别). The noun form 'a farewell' is also common, especially in phrases like 告别仪式 (farewell ceremony) or 告别信 (farewell letter).