serenest

Adjective

serene (comparative more serene or serener, superlative most serene or serenest)

1. Calm, peaceful, unruffled.
   • She looked at her students with joviality and a serene mentality.

   Synonyms:

   cool-headed, placid, calm, steady, collected, composed, equable, equanimous, equanimitable, even-keeled

2. Without worry or anxiety; unaffected by disturbance.
   • I took train and reached Wichita, where my active partner was awaiting me. He had just returned from the Medicine River, and reported everything serene.1908, Andy Adams, Reed Anthony, Cowman

   Synonyms:

   easygoing, unconcerned, airy, at ease, at peace, carefree, careless, casual, chill, cool

3. (archaic) Fair and unclouded (as of the sky); clear; unobscured.
   • Now ſleeping flocks on their ſoft fleeces lie, / The moon, ſerene in glory, mounts the sky, […]1717, Alexander Pope, “Winter. The Fourth Pastoral. […]”, in The Works of Mr. Alexander Pope, volume I, London: […] W[illiam] Bowyer, for Bernard Lintot, […], →OCLC, page 30
4. Used as part of certain titles, originally to indicate sovereignty or independence.
   • Her Serene Highness

See all 8 meanings of serene