What do I need to learn about a word?
A dictionary can give you information about the following: spelling, meaning, pronunciation, part of speech, inflected forms, grammatical features, collocations, similar or opposite words, and example phrases or sentences.
When you write a word in your notebook, you may choose to write some or all of this information. It is up to you to decide how much information you are going to record.
It is important to consider the following: Do I want to make this word part of my active vocabulary? Or is this a word that I want to understand when I read and listen?
If you want to make a word part of your active vocabulary, then you should take notes on: spelling, meaning, pronunciation, part of speech, inflected forms, grammatical features, collocations, similar or opposite words, and example phrases or sentences.