In case you forgot, you can always search the definition of a word you don’t understand, without having to open Google or Dictionary.com. It’s quite simple, actually:
1. Select the word that you don’t understand the meaning.
2. Hold control+click that word, revealing alternate menu.
3. Select “Look Up [word]”, and you’re done.
This procedure might be simple. But it helps a lot, especially when the need for you to read streaming of words from educational papers, review page, etc. It keeps you focus on what you read, without having to open another tab just to find definition of a word.