adj.
engaged in or accustomed to close observation; "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"
adj.
having brief brilliant points or flashes of light; "bugle beads all aglitter"; "glinting eyes"; "glinting water"; "his glittering eyes were cold and malevolent"; "shop window full of glittering Christmas trees"; "glittery costume jewelry"; "scintillant mica"; "the scintillating stars"; "a dress with sparkly sequins"; "`glistering' is an archaic term"
adj.
being full of or promoting cheer; having or showing good spirits; "her cheerful nature"; "a cheerful greeting"; "a cheerful room"; "as cheerful as anyone confined to a hospital bed could be"
adj.
having or showing great excitement and interest; "enthusiastic crowds filled the streets"; "an enthusiastic response"; "was enthusiastic about taking ballet lessons"
adj.
lacking in liveliness or animation; "he was so dull at parties"; "a dull political campaign"; "a large dull impassive man"; "dull days with nothing to do"; "how dull and dreary the world is"; "fell back into one of her dull moods"