← BackshareGuesstime consuming/taɪm kənˈsumɪŋ/adjectiveTaking a lot of time; requiring a long time to do.We need to find a faster way to do this task because it's too time-consuming.Filling out all these forms is very time-consuming.Building a model airplane can be a fun but time-consuming hobby.SynonymsslowtediousAntonymsefficientquick