Halcyon/ˈhælsiən/ Definition 1 of 3Pro Tip 1/3Positive Connotation Halcyon describes an idealized period of time, often invoking nostalgia. Grandma spoke of the halcyon summers at the lake. Pro Tip 2/3Not Just Weather While it implies tranquility, 'halcyon' can refer to any peaceful situation, not only calm weather. Their halcyon conversation soothed his nerves. Pro Tip 3/3Be Mindful of Tone 'Halcyon' may seem overly poetic in casual conversations and can sound out of place. She longed for the halcyon days, before smartphones and emails.