You will not learn a new word merely by reading its definition. Rather, you will learn it by writing the definition from memory.
You will reinforce your memory as you write example sentences using the word in context.
The word will become part of your vocabulary once you use Brain Bank's free flash cards to help you study.
And you will solidify your understanding of the word when you take it out into the world and use it in conversation.
So don't just look it up. Write it out, study it, remember it, ultimately, use it!