overcast sky 阴天
overcast weather 阴沉天气
overcasting stitch 包边缝法
overcast edge 锁边边缘
fabric overcasting 面料锁边
A: The sky is overcasting today.
A：今天天空很阴沉。
B: Yes, it looks like rain is coming.
B：是的，看起来要下雨了。
1) 指云层完全遮盖天空的天气状态
2) 指缝纫中对布料边缘进行锁边处理
3) 指覆盖或遮挡某物的动作
1. 阴天；覆盖
2. 锁边（缝纫术语）
noun / verb form (technical usage)
1. a process of covering or finishing edges, especially in sewing, or the condition of being completely clouded over
Synonym: covering, edging