guttering noun (-s) Etymology:gutter (I) + -ing 1.: the material for or of gutters 2. a.: a length or section of a gutter : gutter I 2a < saw a sparrow repeatedly slide down inside a short bent pipe from the guttering at the top — Alice E. Millard > b.: gutters 3.[from gerund of gutter (II) ]: the melted wax that runs down a candle