/euh thwawrt"/ , adv.
1. from side to side; crosswise.
2. Naut.
a. at right angles to the fore-and-aft line; across.
b. broadside to the wind because of equal and opposite pressures of wind and tide: a ship riding athwart.
3. perversely; awry; wrongly.
prep.
4. from side to side of; across.
5. Naut. across the direction or course of.
6. in opposition to; contrary to.
[ 1425-75; late ME; see A- 1 , THWART ]