Definition of baby monitor
: an electronic device consisting of a one-way radio or video transmitter with a portable receiver for remotely listening to or observing an otherwise unattended child
Since they were introduced in the early eighties, baby monitors have helped reassure millions of moms and dads that their children were snoozing safely.— Anna David
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Merriam-Webster unabridged
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Time Traveler for baby monitor
The first known use of baby monitor was in 1985
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