BUSY - [adjective] having a lot of work or other things to do
Examples of use
Since he took up his new job, he's extremely busy and has no time for friends and family.
Are we going to the cinema tonight? No, sorry, I'm busy. I have to finish the project for tomorrow.
Learn more English words
English speaking practise
Remember that if you don't use that word in English conversations or writing you'll forget it in a short time. So the best thing you can do to learn this word is just trying to use it in speaking or writing. Remember also that practise is the key to fluent english speaking.
You can always find a partner, who would also like to improve his/her