an occasion when you have an informal meal of sandwiches, etc. outside, or the food itself

If the weather's nice we could have a picnic in the park. 天气好的话我们就能去公园野餐了。

Why don't you take a picnic with you? 你为什么不带上野餐时吃的东西？

a picnic area/lunch/table 野餐区域／野外午餐／野餐桌

a picnic basket/hamper 野餐篮

be no picnicidiom informal 不是轻松愉快的事

to have a picnic somewhere

There were several families picnicking on the river bank. 有几家人在河岸上野餐。