obvious to the eye; "a visible change of expression"
capable of being seen; or open to easy view; "a visible object"; "visible stars"; "mountains visible in the distance"; "a visible change of expression"; "visible files"
condition of heightened watchfulness or preparation for action; "bombers were put on alert during the crisis"
very attentive or observant; "an alert and responsive baby is a joy"; "caught by a couple of alert cops"; "alert enough to spot the opportunity when it came"; "constantly alert and vigilant, like a sentinel on duty"
(usually followed by `to') showing acute awareness; mentally perceptive; "alert to the problems"; "alive to what is going on"; "awake to the dangers of her situation"; "was now awake to the reality of his predicament"
not unconscious; especially having become conscious; "the patient is now awake and alert"
perceptible by the senses or intellect; "things happen in the earth and sky with no discernible cause"; "the newspaper reports no discernible progress in the negotiations"; "the skyline is easily discernible even at a distance of several miles"
capable of being seen or noticed; "a discernible change in attitude"; "a clearly evident erasure in the manuscript"; "an observable change in behavior"
capable of being perceived clearly; "an essay with a meaning that was not always discernible"
precisely and clearly expressed or readily observable; leaving nothing to implication; "explicit instructions"; "she made her wishes explicit"; "explicit sexual scenes"