陆续 (lù xù) is an adverb meaning 'one after another' or 'in succession', describing events or actions that happen at separate but closely spaced intervals, not all at once and not randomly — there's a sense of gradual, orderly unfolding over time. The character 陆 originally means 'land' but here functions phonetically; 续 means 'to continue' or 'to carry on'. Together, they evoke the idea of things continuing one by one, like people arriving steadily at a gathering or tasks being completed stepwise.

This word emphasizes continuity without implying strict regularity or simultaneity. It’s commonly used in contexts involving arrivals, departures, completions, or appearances — such as guests arriving at a party, students handing in assignments, or birds landing on a branch. It often appears with verbs like 到达, 出现, 完成, or 离开, and typically modifies the verb phrase rather than standing alone. It carries a neutral, slightly formal tone and is frequent in both spoken and written Chinese.