Not involving or based on selection; not choosing or discriminating between different options or possibilities. The nonselective admission policy of the school allows students from all backgrounds to enroll.
Affecting or involving all parts or elements equally, without distinction. The nonselective herbicide killed all the plants in the garden, not just the weeds.
Medicine, pharmacology: acting on multiple receptor types or physiological systems rather than targeting a single, specific one. Propranolol is a nonselective beta-adrenergic blocker that affects both β1 and β2 receptors.