What does "stonechat" mean?

Stonechat: (a) A small, active, and very common European singing bird (Pratincola rubicola); -- called also chickstone, stonechacker, stonechatter, stoneclink, stonesmith. (b) The wheatear. (c) The blue titmouse. Note: The name is sometimes applied to various species of Saxicola, Pratincola, and allied genera; as, the pied stonechat of India (Saxicola picata).