I'd like to start a 3 part series on the word 'free'.
It has many meanings, but I will just introduce three which are useful to know for everyday conversation.
This week's phrase is "I'm free".
Generally it means with constraints or restrictions.
"The criminal was free after 3 years in prison."
However, in everyday conversation, you can use it to talk about your schedule and plans.
"I'm free this weekend. Do you want to go for dinner?"