grey-brown s of brown tinged with grey Usage(s) Then it rose to the stratosphere, trailed by a churning grey-brown pillar of water and the pulverized remains of the little sandspit of Elugelab. Hour after hour the troops filed by, impressive in their grey-brown, ankle-length overcoats while airplanes flew back and forth in formation. The most engaging new celebrity in Washington last week was a 320-year-old boy dressed in a grey-brown tunic and a plumed velvet hat. Synonym(s) gray-brown greyish-brown grayish-brown