toolingPronunciation: /ˈtuːlɪŋ/Definition of tooling noun [mass noun] 1assorted tools, especially ones required for a mechanized process: [as modifier]:the tooling costs for the latest Ford Fiesta the process of making or working something with tools: [as modifier]:the deck moulding showed some tooling marks 2the ornamentation of a leather book cover with designs impressed by heated tools: ornaments ready to use in the gold tooling of fine bindingstooling in other Oxford dictionaries Definition of tooling in the US English dictionary