Lamb from A to Z - Characteristics based on age and origin 

 Definitions
A lamb is the young (male or female) of the ewe, less than 300 days old. After this point, it becomes mutton, with meat that is less refined and stronger in flavour.

Lamb is cut up in the same way as mutton and is generally eaten roasted.

N.B. To be called “lamb,” the animal must not be more than 300 days old.