Also, trade winds. Also called trades. any of the nearly constant easterly winds that dominate most of the tropics and subtropics throughout the world, blowing mainly from the northeast in the Northern Hemisphere, and from the southeast in the Southern Hemisphere.
any wind that blows in one regular course, or continually in the same direction.
The winter trade wind blows fairly steadily during these months, bringing generally fine tropical weather.
At the same time, there are rain bands in the trade wind flow moving toward the island-induced land breeze convergence zone.
trade wind waves can be high, but have less energy than north and south swells.
British Dictionary definitions for trade wind
a wind blowing obliquely towards the equator either from the northeast in the N hemisphere or the southeast in the S hemisphere, approximately between latitudes 30° N and S, forming part of the planetary wind system
C17: from to blow trade to blow steadily in one direction, from trade in the obsolete sense: a track