Definition of constantly
1
: without variation, deviation, or change : always
constantly on the alert constantly improving a temperature that's constantly maintained … the fear of the sea was constantly in my mind, battling with the fear of my companions.— Robert Louis Stevenson
2
: with regular occurrence : incessantly
constantly complaining After all, Val doesn't let him get a lick of rest and is constantly bugging him to play with her.— Ryan D. Wilson All my traveling life, 40 years of peregrinating Africa, Asia, South America and Oceania, I have thought constantly of home—and especially of the America I had never seen.— Paul Theroux
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Merriam-Webster unabridged
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Time Traveler for constantly
The first known use of constantly was in 1651
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