halcyon /ˈhælsi.ən/noun 3adjective 2forms 3phrases 1 noun3 •(literary) A kingfisher whose nesting by the sea was said, in classical mythology, to cause the Gods to restrain the wind and waves.Amidst our Arms as quiet you shall be / As Halcyons Brooding on a Winter Sea. — 1665 •(literary) The dead body of such a bird, said in Tudor times to act as a weather vane when hung from a beam.But novv hovv stands the vvind? / Into vvhat corner peeres my Halcions bill? — 1589 •A tropical kingfisher of the genus Halcyon, such as the sacred kingfisher (Halcyon sancta) of Australia. adjective2 •Pertaining to the halcyon or kingfisher.Renege; affirm, and turn their halcyon beaks / With every gale and vary of their masters, — 1603 •(figurative) Calm, undisturbed, peaceful, serene.Reflections of this kind may have trifling weight with men who hope to see realized in America the halcyon scenes of the poetic or fabulous age. — 1787 formshalcyons · more halcyon · most halcyon Phrases with halcyon halcyon daysA period of calm, usually in the past and often nostalgic.