semilucid adjective2 •Involving a certain amount of lucidity.Patients with Alzheimer's disease may have semilucid moments.I had a semilucid dream in which I was vaguely aware that I was dreaming. •Partly transparent; translucent.Cowering beneath a semilucid veil, A semilucid bridal veil of snow, Which from the wreath that binds her temples pale Down to her white and slender feet doth flow. — 1842