at half-mast if a flag is flying at half-mast, it has been raised to the middle of the pole in order to show respect and sadness for someone who has died
at half-mastBritish Englishhumorous if a piece of clothing is at half-mast, it is lower down the body than is usual
a large connective tissue cell that contains histamine and heparin and serotonin which are released in allergic reactions or in response to injury or inflammation