1. To spend, endure, or survive some storm: We weathered out the storm in a shelter. I'm not sure if we will evacuate the area or stay here and weather the storm out.
2. To force the cancellation or postponement of some event because of adverse weather: Our flight was scheduled for 6:00, but the storm weathered it out. The picnic was weathered out.
3. To spend, endure, or survive something: I weathered out five tours in Vietnam. The first weeks of school are difficult, but you'll weather them out.
4. To become exposed by the erosion of surrounding material: Some of the dinosaur bones remain embedded in the rock, while others are lying on the surface where they weathered out. We found many geodes that had weathered out and were lying in the sand.
5. weather out of To become separated from some surrounding material by the erosive effects of weather: The holes are where hematite has weathered out of the sandstone. We found gold that had weathered out of a vein upstream.