adj. Lit., of or pert. to a lot or piece of sandy ground, -- hence, pert. to, or characteristic of, the policy or practices of the socialistic or communistic followers of the Irish agitator Denis Kearney, who delivered many of his speeches in the open sand lots about San Francisco.adj. of or pertaining to a sandlot; -- used especially in reference to informal games played by childrenn. a vacant lot, especially one where children play games.