Situated or placed across something else; transverse; oblique.
- To prevent the occurrence, realization, or attainment of: They thwarted her plans.
- To oppose and defeat the efforts, plans, or ambitions of.
- Nautical A seat across a boat on which a rower may sit.
- Extending, lying, or passing across; transverse.
- Eager to oppose, especially wrongly; perverse.
- Archaic Athwart; across.