Hamper can be a verb meaning to prevent or hinder movement or progress, or a noun meaning a large basket or case. Learn the origin, synonyms, and usage of hamper with examples from various sources. The meaning of HAMPER is to restrict the movement of by bonds or obstacles : impede. How to use hamper in a sentence. Synonym Discussion of Hamper. Hamper definition: To prevent the free movement, action, or progress of. HAMPER meaning: 1. to prevent someone doing something easily: 2. a large, rectangular container with a lid: 3. a…. Learn more.