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Definition of Watchful
1. Adjective. Engaged in or accustomed to close observation. "Constantly alert and vigilant, like a sentinel on duty"
Similar to: Argus-eyed, Open-eyed, Vigilant, Wakeful, Fly, Heads-up, Wide-awake, Lidless, Sleepless
Also: Wary, Awake, Lively
Derivative terms: Alert, Alertness, Watchfulness, Watchfulness
Antonyms: Unalert
2. Adjective. Experiencing or accompanied by sleeplessness. "Twenty watchful, weary, tedious nights"
Definition of Watchful
1. a. Full of watch; vigilant; attentive; careful to observe closely; observant; cautious; -- with of before the thing to be regulated or guarded; as, to be watchful of one's behavior; and with against before the thing to be avoided; as, to be watchful against the growth of vicious habits.
2. a. Full of watch; vigilant; attentive; careful to observe closely; observant; cautious; -- with of before the thing to be regulated or guarded; as, to be watchful of one's behavior; and with against before the thing to be avoided; as, to be watchful against the growth of vicious habits.
Definition of Watchful
1. Adjective. observant, vigilant and aware ¹
¹ Source: wiktionary.com
Definition of Watchful
1. closely observant or alert [adj]
Medical Definition of Watchful
1. Full of watch; vigilant; attentive; careful to observe closely; observant; cautious; with of before the thing to be regulated or guarded; as, to be watchful of one's behavior; and with against before the thing to be avoided; as, to be watchful against the growth of vicious habits. "Many a watchful night." . "Happy watchful shepherds." . "'Twixt prayer and watchful love his heart dividing." (Keble) Synonym: Vigilant, attentive, cautious, observant, circumspect, wakeful, heedful. Watch"fully, Watch"fulness. Source: Websters Dictionary (01 Mar 1998)