提纲 (tí gāng) literally combines 提 (tí), meaning 'to raise' or 'to bring up', and 纲 (gāng), meaning 'main rope' or 'central framework' — together evoking the image of pulling out the essential structural lines of something, like the main rope in a fishing net that holds everything together. As a noun, it refers to an outline: a concise, organized summary of key points that serves as a blueprint for writing, speaking, or planning.

This word is commonly used in academic, professional, and educational settings — for example, when preparing a speech, drafting an essay, or designing a lesson plan. A 提纲 is not just a list; it reflects logical hierarchy and conceptual clarity, emphasizing core ideas while omitting supporting details. It’s more formal and structured than informal notes (笔记) and carries an expectation of coherence and purpose.