An allergic reaction to dust particles.

Fine, dry particles of matter often found in the environment.

पर्यावरण में प्रायः पाए जाने वाले बारीक, सूखे पदार्थ के कण।

English Usage: There was a layer of dust on the old bookshelf.

Hindi Usage: पुरानी बुकशेल्फ पर धूल की परत थी।