Senses
没事/ 沒事 to be all right
to be safe or out of danger; to be fine after an accident or illness
没事/ 沒事 it is nothing
it is not important; it does not matter; never mind
没事/ 沒事 to be free
to have nothing to do; to have free time
没事/ 沒事 unemployed
to be out of work; to have no job
没事/ 沒事 you are welcome
(Mainland China) used to respond to a thank you, meaning "it was nothing" or "no problem"