jigsaw /ˈd͡ʒɪɡ.sɔː/noun 3verb 1forms 4 noun3 •A jigsaw puzzle. •Something that can be compared to a jigsaw puzzle.A rolling programme of platform closures will enable Network Rail to replace 54-year-old signalling and (when complete in 2022) complete a jigsaw of upgrades that started in 2005. — 2021 •A power saw with fine teeth and a narrow blade which can cut curves in wood or metal. verb1 •To cut something using a jigsaw. formsjigsawed · jigsawn · jigsawing · jigsaws