noun Any powder (originally containing gypsum plaster and glue) that when mixed with water forms a plastic paste, which is used to fill cracks and holes in plaster.
noun A plastic paste meant for filling cracks and holes in plaster.
noun A paste-like substance that fills a gap.
verb To fill or repair with a plastic paste.
verb To fill cracks or holes with a spackle.
verb To fill gaps with something, as if spackling; to speckle
The neighborhood has been spackled with coffee shops.