1) Regard as essential 2) To wish or long for 
• (v. t.) To desire; to feel the want of; to lack; to miss; to want.
De·sid'er·ate transitive verb [ imperfect & past participle Desiderated ; present participle & verbal noun Desiderating .] [ Latin desideratus , past participle of desiderare to desire, miss. See Desire , and confe...
to wish or long for.