Fine, dry particles of matter found in the air and on surfaces, often consisting of tiny bits of dirt, skin, or other materials. The shelves were covered in a thick layer of dust.
A cloud of fine particles in the air, often stirred up by wind or movement. The car sped down the dirt road, leaving a trail of dust behind it.
A state of disuse or neglect, often symbolized by the accumulation of dust. The old piano sat in the corner, gathering dust for years.
Earth or soil, especially when regarded as the substance of which the human body is composed. The phrase 'ashes to ashes, dust to dust' is often recited at funerals.