My vomit has been clear for the past 8 hrs iv been sick what does that mean?

Nothing in stomach: It means there is nothing in your stomach, no food or colored liquid. If there was a blockage after your stomach, you might vomit bile, so it is also an indication there is no blockage from your esophagus through the upper part of your small intestines that is causing you to vomit. Hope you feel better soon. Keep up with your fluid losses due to vomiting and dont dehydrate.