What is is the meaning of being sad?

Its quite simple really, sadness is the uncontrollable and overwhelming feeling of utmost despair and loss. It clouds your mind consuming you, as you allow yourself to be sucked in the pit of witch the climb out is steep and treacherous. It takes a hold of you making you only focus on the wound. For some sadness can be hidden, maybe with a smile every day to fool those of whom you care about from worrying. Or perhaps a misdirection during a conversation of whenever someone tries to get to know you or love you. You may find it better to save yourself from the suffering and pain others can bring upon you. Its funny of how one word can hold so much meaning.