You already know where the word witenagemot is located in the dictionary.
The key to finding it is in the letters of the word itself.
Now, if witenagemot refers to more than one thing, and therefore has multiple definitions, you search those definitions sequentially, unless you already know that the definition you want came into use later in the word’s history. In that case, you would skip toward the end of the list of definitions because the definitions are ordered by when they came into use.
Sometimes, you search for something whose location is already known.
* Orlando Bartro is the author of Toward Two Words, a comical & surreal novel about a man who finds yet another woman he never knew, usually available at Amazon for $4.91.