#1 hold in v. close in; darkness enclosed him". wn
#2 hold in v. lessen the intensity of; temper; hold in restraint; hold or keep within limits; "moderate your alcohol intake"; "hold your tongue"; "hold your temper"; "control your anger". wn
#3 hold in v. hold back; keep from being perceived by others; "She conceals her anger well". wn
vizzz