Dic: in demand

■ If someone or something is in demand or in great demand, they are very popular and a lot of people want them. (COBUILD)

■ wanted by a lot of people (OALD)

■ sought after; popular (COLLINS)

■ greatly desired; coveted, desired, in demand(p), sought after (WordNet)

• He was much in demand as a lecturer in the US.
• Good nurses are always in demand.

.... COBUILD, OALD