The Collaborative International Dictionary of English v.0.48:

Emphasize \Em"pha*size\, v. t. [imp. & p. p. Emphasized; p.
   pr. & vb. n. Emphasizing.]
   To utter or pronounce with a particular stress of voice; to
   make emphatic; as, to emphasize a word or a phrase.

The Collaborative International Dictionary of English v.0.48:

emphasized \em"pha*sized\ adj.
   Having stress or emphasis.

   Syn: emphatic. [WordNet 1.5]

WordNet (r) 3.0 (2006):

emphasized
    adj 1: spoken with emphasis; "an emphatic word" [syn:
           emphatic, emphasized, emphasised]