mass noun
1- the state of the atmosphere at a place and time as regards heat, cloudiness, dryness, sunshine, wind, rain, etc.天气：
if the weather's good we can go for a walk.
天气好我们就可以出去散步。
1.1
- cold, wet, and unpleasant or unpredictable atmospheric conditions; the elements恶劣天气（指寒冷、潮湿等）; 自然力：
stone walls provide shelter from wind and weather.
石墙可以挡风遮雨。
1.2
- as modifier denoting the side from which the wind is blowing, especially on board a ship; windward上风面, 向风侧：
the weather side of the yacht.
游艇向风的一侧。与LEE相对。
with obj.
1
- wear away or change the appearance or texture of (something) by long exposure to the atmosphere使受风吹雨打, 使受风雨侵蚀：
with obj. and complement his skin was weathered almost black by his long outdoor life长期在户外生活, 使得他的皮肤几乎变成黑色
as adj. weathered chemically weathered rock.受化学侵蚀的岩石。
1.1
- no obj.(of rock or other material) be worn away or altered by such processes（岩石或其他物质）风化; 受侵蚀; 经受风雨：
the ice sheet preserves specimens that would weather away more quickly in other regions.
冰层保存了其他地区会更快被侵蚀掉的标本。
1.2
- usu. as noun weathering Falconry allow (a hawk) to spend a period perched in the open air【猎鹰】让（鹰）在露天栖息一段时间。
2
- come safely through (a storm)平安度过（暴风雨）。
2.1
- withstand (a difficulty or danger)经受住（困难, 危险）：
this year has tested industry's ability to weather recession.
今年对工业经受衰退的能力是个考验。
2.2
- Sailing (of a ship) get to the windward of (a cape)【航海】（船）航行到（海角）的上风; 安全绕过（海角）。
3
- make (boards or tiles) overlap downwards to keep out rain使（板, 瓦片）交搭向下倾斜以挡雨。
3.1
- (in building) slope or bevel (a surface) to throw off rain（建筑用语）使（表面）倾斜以利于排去雨水。
短语
in all weathers
- in every kind of weather, both good and bad无论什么天气, 风雨无阻。
keep a weather eye on
- observe very carefully, especially for changes or developments仔细观察（尤指变化或发展）。
make heavy weather of
- informal have unnecessary difficulty in dealing with (a task or problem)〈非正式〉对（任务, 问题）小题大做。
- ORIGIN: from the nautical phrase make good or bad weather of it, referring to a ship in a storm.
under the weather
- informal slightly unwell or in low spirits〈非正式〉不舒服的; 情绪低落的。
词源
Old English weder, of Germanic origin; related to Dutch weer and German Wetter, probably also to the noun WIND1.