(transitive) To stuff to excess. / (transitive) To cover completely with soft upholstery.

Third-person singular simple present indicative form of overstuff

Filled beyond capacity. / Of a piece of upholstered furniture, such as a chair or sofa: Covered completely and deeply with upholstery or overstuffing.

simple past tense and past participle of overstuff.

present participle of overstuff

Material used in upholstering just under the top fabric.