The act by which something is stacked.

(uncountable) Sport stacking.

(chemistry, countable) A stacked arrangement of often aromatic molecules, adopted due to interatomic interactions.

Making claims for a single incident on multiple insurance policies.

(photography) An image processing technique to reduce noise or add special effects.

(television) A technique for keeping a captive audience by grouping together programs with similar appeal.

present participle and gerund of stack