1. the quality or state of being sticky, viscous, or adhesive like gum
2. the presence of gummy or sticky residue on a surface

Examples

• The gumminess of the tape made it easy to stick the poster to the wall.
• After sitting in the sun, the candy developed an unpleasant gumminess.
• The gumminess of the old label made it difficult to remove from the jar.
• She disliked the gumminess of the overripe fruit.
• The gumminess of the adhesive wore off after a few weeks.