plumb line plumb level • plum blotch · · · Info · Definitions · Synonyms · Characters · · plumb line · · Text Common · · Latin · · Scripts 10 · · Length Definitions · · · (noun) a cord from which a metal weight is suspended pointing directly to the earth's center of gravity; used to determine the vertical from a given point. Synonyms: perpendicular. · · Noun Definition 1 Synonyms · · · plumb bob · · Synonym 1 plumb · · Synonym 2 plummet · · Synonym 3 clean · · Synonym 4 plum · · Synonym 5 Characters · · space U+0020 b latin small letter b U+0062 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E p latin small letter p U+0070 u latin small letter u U+0075