The structure uses "radar" (a detection system for aircraft and ships) as a metaphor for mental awareness, forming a phrase that compares noticing something to spotting a blip on a screen. It is used to refer to someone or something that has captured one's attention or is within one's awareness or consideration. People typically say something is "on my radar" when they are actively tracking it, or "not even on my radar" when something is completely unimportant or unnoticed. The term originated in mid 20th century military and aviation jargon, later spreading into business, everyday conversation, and pop culture.

英語での「on one's radar」の定義と意味

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