[{"Bold_text": "adjective", "List Items": ["serving or acting as an instrument or means; useful; helpful.Synonyms: implemental , effective , effectual", "performed on or written for a musical instrument or instruments:instrumental music.", "of or relating to an instrument or tool.", "Grammar.(in certain inflected languages, as Old English and Russian) noting or pertaining to a case having as its distinctive function the indication of means or agency, as Old Englishbeseah bl?the andweitan“looked with a happy countenance.”noting the affix or other element characteristic of this case, or a word containing such an element.similar to such a case form in function or meaning, as the Latin instrumental ablative,gladi?,“by means of a sword.”(in case grammar) pertaining to the semantic role of a noun phrase that indicates the inanimate, nonvolitional, immediate cause of the action expressed by a verb, asthe rockin The rock broke the windowor in I broke the window with the rock.", "(in certain inflected languages, as Old English and Russian) noting or pertaining to a case having as its distinctive function the indication of means or agency, as Old Englishbeseah bl?the andweitan“looked with a happy countenance.”", "noting the affix or other element characteristic of this case, or a word containing such an element.", "similar to such a case form in function or meaning, as the Latin instrumental ablative,gladi?,“by means of a sword.”", "(in case grammar) pertaining to the semantic role of a noun phrase that indicates the inanimate, nonvolitional, immediate cause of the action expressed by a verb, asthe rockin The rock broke the windowor in I broke the window with the rock."]}, {"Bold_text": "noun", "List Items": ["Grammar.the instrumental case.a word in the instrumental case.a construction of similar meaning.", "the instrumental case.", "a word in the instrumental case.", "a construction of similar meaning.", "a musical composition played by an instrument or a group of instruments.Compare vocal(def8) vocal(def8)."]}]