adj. 25B6; adjective
an elaborate plan : COMPLICATED, complex, intricate, involved; detailed, painstaking, careful; tortuous, convoluted, serpentine, Byzantine.
an elaborate plasterwork ceiling : ORNATE, decorated, embellished, adorned, ornamented, fancy, fussy, busy, ostentatious, extravagant, showy, baroque, rococo, florid, wedding-cake.
simple, plain.
25B6; verb both sides refused to elaborate on their reasons : EXPAND ON, enlarge on, add to, flesh out, put flesh on the bones of, add detail to, expatiate on; develop, fill out, embellish, embroider, enhance, amplify.