Inundation means being flooded or overwhelmed, most often by water covering normally dry land.

What is inundation?

At its core, inundation is:

  • The covering of land with large amounts of water, usually from floods, storm surges, tsunamis, or heavy rain.
  • A state where an area that is normally dry is underwater.
  • In more formal dictionary terms, “the fact of large amounts of water covering an area that is usually dry.”

In earth and ocean science, inundation often refers to how far water pushes inland during events like tsunamis, hurricanes, or storm surges, and how deep that water gets above the ground surface.

Physical vs. figurative inundation

“Inundation” can be used in two main ways:

  1. Literal (physical) inundation
    • River flooding spreading over a floodplain.
    • Coastal areas submerged by storm surge, with dunes and shorelines completely underwater.
 * The annual flooding of the Nile valley, often called its “annual inundation.”
  1. Figurative inundation
    • Being overwhelmed by a huge quantity of something:
      • “An inundation of emails” or “an inundation of tourists in summer.”
 * Here it means an overwhelming or excessive abundance, like a “flood” of information or requests.

Quick facts at a glance

  • Part of speech: Noun.
  • Core meaning: Flooding or overwhelming, especially by water.
  • Used in:
    • Earth science (tsunami, storm surge, coastal flooding).
* Everyday language to mean “overwhelmed by a lot of something.”

Short TL;DR

Inundation is flooding—water covering land that is usually dry—and by extension, any situation where something comes in such large amounts that it overwhelms you.

Information gathered from public forums or data available on the internet and portrayed here.