1. [noun] The property of sticking or adhering; adhesion
2. [noun] Warmth and humidity, as on a muggy day
3. [noun] (economics) (of prices or wages) the tendency to stay the same despite changes in the economy
4. [noun] (marketing) (interface design) the presence of unique attributes that make a product indisposable and valuable to its owner
5. [noun] (advertising) a research measure that captures the extent to which viewers wish to spend more time looking at or reading a print ad.
6. [noun] (psychology) an overemotional attachment to others; clinging in interpersonal relations; difficulty with ending conversations
7. [noun] The property of sticking to a surface.