n. Ingenuousness; frankness; openness of heart.n. The quality of being ingenious; inventive capacity or faculty; aptness in contrivance or combination, as of things or ideas; skill; cleverness: as, ingenuity displayed in the construction of machines, or of arguments or plots.n. Ingenious contrivance; skilfulness of design, construction, or execution: as, the ingenuity of a machine; the ingenuity of a puzzle or a poem.