on demand

on demand

Meaning:
– when needed
– when asked for
– to ask for with proper right
– claim as a right
– at any time that you want or need something

Examples:
1. These days babies are normally fed on demand.
2. Ronnie is always ready to dance on demand.
3. The fee is payable on demand.
4. They can give you Home Delivery service of medicine on demand.
5. The corrupt manager of financial department had resigned on demand.
6. The character and story of the film has revised on demand of audience.

Origin:
1250–1300; Middle English demaunden < Anglo-French demaunder < Medieval Latin dēmandāre to demand, Lto entrust, equivalent to dē- de- + mandāre to commission, order.

Synonyms of demand:
insist, command, order, require, stipulate, exact and claim.