radar ra‧dar [ˈreɪdɑ ǁ -dɑːr] noun [uncountable]
1. be off/below the radar ( screen) used when saying that people do not know about or are not thinking about something, especially something that will later become important:
• Many of these technologies were below the radar of the mainstream business press.
• HIV/AIDS has fallen off our radar screens in recent years.
2. be on the radar ( screen) used when saying that people know about or are thinking about something, especially something that will later become important:
• Stem cell research and biotech in general are on the radar screen of venture capitalists nationwide.
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radar UK US /ˈreɪdɑːr/ noun [C]
Financial and business terms. 2012.