- vigilant or alert; closely observant: The sentry remained watchful throughout the night.
- Archaic. wakeful.
Origin of watchful
SynonymsSee more synonyms for on Thesaurus.com
1. See alert.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for watchful
There was no shelling this time, but there was the hum of watchful drones.Gaza ‘Mass Execution’ Investigated
August 5, 2014
Under the watchful eye of Zuckerberg, Facebook’s policy seems to be “if you can’t beat ‘em, join ‘em.”WhatsApp Experiences Massive Outage Days After Facebook Acquisition, Internet Blames Zuckerberg
February 22, 2014
Fuming, Jesse keeps a watchful eye on Walt, but he doesn't speak, or move.The Daily Beast Staff Picks Their Favorite ‘Breaking Bad’ Moments (VIDEO)
The Daily Beast
September 28, 2013
“Nickelodeon was nothing short of amazing to work for, and they had their watchful eye on us all,” he said.The Amanda Bynes Meltdown: What Former Child Stars Are Saying
June 4, 2013
Will the foreign depositors view 15% as the simple cost of stashing their money out of the watchful eye of their own government?Cyprus to Small Depositors: We Won't Take Quite So Much of Your Money
March 18, 2013
Robert's suspicions were lulled to sleep, and he ceased to be as vigilant and watchful as he had been.Brave and Bold
The Legislature is the watchful guardian over the public purse.
The reports of the rifles and cannon kept every one alert and watchful.
The regiment after salving its wounds resumed its watchful march.
Refreshed and watchful, the regiment rode away from Bellevue.
- vigilant or alert
- archaic not sleeping
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for watchful
Online Etymology Dictionary, © 2010 Douglas Harper