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.
hand over fist
make a good fist of
make a poor fist of
to do (something) badly
rule with an iron fist