dis-Pronunciation: /dɪs/Definition of dis- prefix 1expressing negation:disadvantage disbelieve 2denoting reversal or absence of an action or state:diseconomy disaffirm 3denoting removal of something:disbud denoting separation:discarnate denoting expulsion:disbar 4expressing completeness or intensification of an unpleasant or unattractive action:disgruntledOrigin:from Latin, sometimes via Old French des-dis- in other Oxford dictionaries Definition of dis- in the US English dictionary