sheath sheatfish • sheathbill · · · Info · Definitions · Synonyms · Characters · · sheath · · Text Latin · · Script 6 · · Length Definitions · · · (noun) a protective covering (as for a knife or sword). · · Noun Definition 1 (noun) an enveloping structure or covering enclosing an animal or plant organ or part. Synonyms: case. · · Noun Definition 2 (noun) a dress suitable for formal occasions. Synonyms: cocktail dress. · · Noun Definition 3 Synonyms · · · case · · Synonym 1 cocktail dress · · Synonym 2 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 h latin small letter h U+0068 s latin small letter s U+0073 t latin small letter t U+0074