de ‧ cid ‧ ed /dɪˈsaɪdəd, dɪˈsaɪdɪd/ BrE AmE adjective [only before noun] formal
[ Word Family: noun : ↑ decision , ↑ indecision ; adverb : ↑ decidedly , ↑ decisively ≠ ↑ indecisively ; adjective : ↑ decided ≠ ↑ undecided , ↑ decisive ≠ ↑ indecisive ; verb : ↑ decide ]
definite and easily noticed:
a decided change for the better