漫 (màn) has two main uses: 'to overflow/inundate' (of water spreading over an area) and 'to stroll/wander freely' (often in compounds like 漫步). For the overflow sense, it is broader than 淹没 (yān mò, to submerge completely) and less literary than 溢 (yì, to spill over). For strolling, it is more formal/poetic than 逛 (guàng, casual leisure stroll) or 溜达 (liū da, everyday walk).