Tuesdayish adjective 1adverb 1forms 2 adjective1 •(informal) Resembling or characteristic of a Tuesday.He loses the robustness and vigor of his physical frame, so that after preaching twice on the Sabbath, he feels Mondayish, and perhaps Tuesdayish. — 1846 adverb1 •(informal) On or around Tuesday. formsmore Tuesdayish · most Tuesdayish