1. 武装入侵;侵略
    To invade a country means to enter it by force with an army.

invade的意思

    e.g. In autumn 1944 the allies invaded the Italian mainland at Anzio and Salerno...
           1944 年秋，盟军从安齐奥与萨勒诺攻入意大利本土。
    e.g. The Romans and the Normans came to Britain as invading armies.
           罗马人以及诺曼人通过军事入侵来到英国。

2. (人、动物)大批进入,涌入
    If you say that people or animals invade a place, you mean that they enter it in large numbers, often in a way that is unpleasant or difficult to deal with.

    e.g. People invaded the streets in victory processions almost throughout the day...
           几乎一整天,大街上都挤满了欢庆胜利的游行队伍。
    e.g. Every so often the kitchen would be invaded by ants.
           厨房常常会遭到大批蚂蚁的进犯。

3. to invade someone's privacy -> see See privacy