defer / postpone / put off They have the same meaning. I'm curious that those words are used in a casual conversation, too. 'put off' is a phrasal verb, so I guess it is commonly used in our daily lives. Then what about 'defer' and 'postpone'? 'postpone', I've heard that many people use it when we talk to each other in a casual situation, but I've never heard of someone says 'defer.' Is is okay to say like: I defer the year when I would move to another country. I don't even know if this example sentence is correct or not. Thank you so much!