To engulf means to completely surround, cover, or swallow something up, often quickly and powerfully. When flames engulf a building, fire surrounds it entirely. When waves engulf a sandcastle, the water rushes over and consumes it. When darkness engulfs a room as the sun sets, shadows swallow up every corner.

The word suggests being overwhelmed or surrounded so completely that escape seems impossible. A dense fog might engulf a mountain road, making it hard to see even a few feet ahead. A crowd might engulf a celebrity at a concert, pressing in from all sides. Strong emotions can engulf someone too: grief might engulf a person after a loss, or joy might engulf someone receiving wonderful news.

Engulf captures that sense of being overtaken by something larger and more powerful than yourself. Unlike gentle words like “surround” or “cover,” engulf suggests intensity and totality. When something engulfs you, it doesn't just touch you or partially cover you. It completely takes over.