Learner's definition of FIST
: the hand with its fingers bent down into the palm
He pounded his fist on the table in anger.
She pounded on the door with both fists.
a clenched fist
make a fist
He defiantly shook his fist at the policeman.
make a good fist ofBritish, informal
make a poor fist ofBritish, informal
: to do (something) badly