Titanic means enormously large, powerful, or important. A titanic storm might uproot trees and flood entire neighborhoods. A titanic effort requires all your strength and determination, like studying for weeks to master a difficult subject. When two teams have a titanic struggle in a championship game, they're evenly matched and fighting with everything they have.

The word comes from the Titans of Greek mythology, who were giants of incredible strength and power. These mythological beings were so mighty that it took the gods themselves to defeat them. When we call something titanic, we're saying it has that same overwhelming quality of size or force.

You might know the word from the RMS Titanic, the famous ocean liner that sank in 1912. The ship earned its name because it was the largest passenger ship ever built at that time, and people thought it represented human achievement at its most powerful.

When you describe something as titanic, you're emphasizing extraordinary size or importance that seems almost superhuman in scope.