adjective
[more ~; most ~]
rare and worth a lot of money
A precious metal is an expensive metal (such as gold) that is used especially for jewelry. - see also semiprecious
very valuable or important :too valuable or important to be wasted or used carelessly
greatly loved, valued, or important
US informal :having a very pleasing and usually youthful appearance or quality :cute
formal + disapproving :having a too careful, precise, or polite quality that seems false or annoying
adverb
very or extremely