inroad UK /ˈɪnɹəʊd/US /ˈɪnˌɹoʊd/noun 2verb 2forms 3 noun2 •An advance into enemy territory, an attempted invasion; an encroachment, an incursion.[A] child knowing the heate of fire, will as readely iudge of the perrill, as the wisest Senatour, of the inroad of a borderer, or the politick captaine, of the vnequall encoũter with his enimy, […] — 1586 •[usually plural] (figurative) Often followed by in, into, or on: initial progress made toward accomplishing a goal or solving a problem.Three weeks into it, I am finally beginning to make inroads on this project. verb2 •(no longer used) To make advances or incursions.[Y]ou must not expect him to go with you, inroading or making incursions into Georgia; for he is an Armenian, true to his faith; and not a Georgian, false and distrustful! — 1792 •(no longer used) To make an inroad into (something).[Y]ea, the Saracens had lately wasted Italy, conquered Spain, inroded Aquitain, and possessed some islands in the mid-land-sea. — 1639 formsinroaded · inroading · inroads