moss

1 of 2

noun

ˈmȯs 

1

chiefly Scotland : bog, swamp

especially : a peat bog

2

a

: any of a class (Musci) of bryophytic plants characterized by a gametophyte having a small leafy often tufted stem bearing sex organs at its tip

also : a clump or sward of these plants

b

: any of various plants resembling moss in appearance or habit of growth

3

: a mossy covering

mosslike

ˈmȯs-ˌlīk 

adjective

moss

2 of 2

verb

mossed; mossing; mosses

transitive verb

: to cover or overgrow with moss

Examples of moss in a Sentence

Noun

Moss covered the fallen logs.

Recent Examples on the Web

Noun

With a reddish-brown lid, covered in moss and grime, neighbors told Giglio that the tub had not been touched since the 70s or 80s. —Alice Gibbs, MSNBC Newsweek, 21 Oct. 2025

The coconut wax blend layers fir needle, balsam, oak moss, and a hint of petrichor (a note that evokes the forest floor after rain). —Michael Stefanov, Robb Report, 14 Oct. 2025

Cleaning the exterior of your house keeps it in good repair by removing algae, mold, moss, and mildew, all of which can damage siding. —Brandee Gruener, Southern Living, 13 Oct. 2025

For instance, investigating this biomineralization process in organisms like aquatic mosses could open a parallel path toward environmental cleanup. —Mrigakshi Dixit, Interesting Engineering, 10 Oct. 2025

Word History

Etymology

Noun

Middle English, from Old English mos; akin to Old High German mos moss, Latin muscus

First Known Use

Noun

before the 12th century, in the meaning defined at sense 1

Verb

15th century, in the meaning defined above

Phrases Containing moss

• club moss
• Iceland moss
• Irish moss
• moss agate
• moss animal
• moss green
• moss-grown
• moss pink
• moss rose
• moss-trooper
• peat moss
• reindeer moss
• Spanish moss
• sphagnum moss

Rhymes for moss

• blas
• bos
• boss
• bosse
• clos
• crosse
• dos
• doss
• dross
• floss
• foss
• fosse

Kids Definition

moss

noun

ˈmȯs

1

: any of a class of plants that have no flowers and produce small leafy stems forming sex organs at their tips and that grow in patches like cushions on rocks, bark, or damp ground

2

: any of various plants (as lichens) resembling mosses compare reindeer moss

mosslike

-ˌlīk

adjective

mossy

ˈmȯ-sē

adjective

Medical Definition

moss

noun

ˈmȯs 

1

: any of a class (Musci) of bryophytic plants having a small leafy often tufted stem bearing sex organs at its tip see sphagnum

2

: any of various plants resembling mosses in appearance or habit of growth see club moss, iceland moss, irish moss