transitive verb
1.
a. : to hold in subjection : suppress
had trouble keeping the insurgents down
b. : to keep in control
kept the horse down with the curb
c. : limit , restrict
tried to keep expenses down
d. : to prevent from growing, advancing, or succeeding
can't keep a good man down
2. : to prevent from regurgitating or vomiting
felt sick but succeeded in keeping his dinner down
3. : to set or leave set in lowercase in printing