: any of a division (Polypodiophyta) or class (Polypodiopsida) of flowerless spore-producing vascular plants having alternating sporophyte and gametophyte generations
especially : any of an order (Polypodiales) of homosporous plants possessing roots, stems, and leaflike fronds compare seed fern
fernlike adjective
ferny adjective

Examples of fern in a Sentence

Recent Examples on the Web
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Planters containing other trees and perennials, including hazel, hawthorn, field maples, ferns, and grasses, will continue the forest theme through the colonnade to the main entrance. Anne Doran, ARTnews.com, 14 May 2026 These easy instructions apply to containers of ferns, foliage, flowers, and summer vegetables. Brandee Gruener, Southern Living, 13 May 2026 The spa At the end of an open-air breezeway flanked by tropical ferns and towering trees stands the entrance to the stunning spa. Condé Nast, Condé Nast Traveler, 13 May 2026 Gift a bouquet of daisies paired with greenery like eucalyptus, ferns, or baby’s breath for a fresh arrangement. Jenny Krane, Better Homes & Gardens, 11 May 2026 See All Example Sentences for fern

Word History

Etymology

Middle English, from Old English fearn; akin to Old High German farn fern, Sanskrit parṇa wing, leaf

First Known Use

before the 12th century, in the meaning defined above

Time Traveler
The first known use of fern was before the 12th century

Browse Nearby Words

Cite this Entry

“Fern.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fern. Accessed 15 May. 2026.

Kids Definition

fern

noun
: any of an order of vascular plants resembling seed plants in having root, stem, and leaflike fronds but reproducing by spores instead of by flowers and seeds
fernlike adjective
ferny adjective

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