|1.||[ noun ] the choicest or most essential or most vital part of some idea or experience|
|Synonyms:||center essence substance heart core sum marrow meat inwardness nub pith nitty-gritty gist kernel|
: "the gist of the prosecutor's argument" "the heart and soul of the Republican Party" "the nub of the story"
|Related terms:||content stuff hypostasis haecceity bare_bones quintessence summate|
|2.||[ adverb ] with complete faith|
"she was with him heart and soul"