fine particles of matter in space.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use cosmic dust in a sentence
In fact, cosmic dust floats here from space rocks hundreds of millions of miles away, bearing tiny messages.
We came back with bags and bags of rocks to search for cosmic dust.
Then he was floating in what felt like waves of cosmic dust, swirling many-colored before his eyes.
The cosmic dust was brighter out here, and the constellations looked a little flattened.
The clouds of cosmic dust swirled and foamed around the familiar jewels of his own sky.
British Dictionary definitions for cosmic dust
fine particles of solid matter occurring throughout interstellar space and often collecting into clouds of extremely low density: See also nebula (def. 1)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012