* To appear large and indistinct in the distance, often in a threatening or ominous way.
* Example: "A dark shape loomed in the fog."
* To be imminent or about to happen.
* Example: "The threat of war loomed over the country."
* To appear or exist in a large or imposing way.
* Example: "The giant redwood trees loomed over the hikers."
The meaning of "looomed" depends on the context in which it is used.