Source : Webster's Revised Unabridged Dictionary (1913)

Lidless \Lid"less\ (l[i^]d"l[e^]s), a.
   Having no lid, or not covered with the lids, as the eyes;
   hence, sleepless; watchful.

         A lidless watcher of the public weal.    --Tennyson.

Source : WordNet®

lidless
     adj 1: not having or covered with a lid or lids; "a lidless
            container" [ant: {lidded}]
     2: having no lid; "a lidless container"
     3: without having the eyes closed or covered by the eyelids;
        "to an eye like mine, a lidless watcher of the public
        weal"- Alfred Tennyson [syn: {sleepless}]