I. ˈmȯs noun
Etymology: Middle English, from Old English mos; akin to Old High German mos moss, Latin muscus
Date: before 12th century
1. chiefly Scottish : 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
• moss·like -ˌlīk adjective
II. transitive verb
Date: 15th century
: to cover or overgrow with moss