雷达 (léidá) means 'radar' and is a phonetic borrowing from English. It is used in both technical and everyday contexts to refer to radar equipment or technology. For example, 用雷达设备工作 means 'to work with radar equipment.'
这架飞机装了最新的雷达系统。
zhè jià fēijī zhuāng le zuìxīn de léidá xìtǒng.
This airplane is equipped with the latest radar system.
雷达显示前方有一片暴风雨。
léidá xiǎnshì qiánfāng yǒu yī piàn bàofēngyǔ.
The radar shows a storm ahead.
交警用雷达测量车辆的速度。
jiāojǐng yòng léidá cèliáng chēliàng de sùdù.
Traffic police use radar to measure the speed of vehicles.