theactof notspeakingto someone, orspeakingto them very little, because you areangryorupsetabout something they have done:
The man and hiswifewere having someproblemsathomeand weregivingeach other thesilenttreatment.
Rudebehaviourthatpeoplereportreceivingfromtheircolleaguesincludesgettingthesilenttreatmentand beingcutoff in aconversation.
Putyourcriticsintheirplacewith thesilenttreatment.