This is when the objects are deformed or stick together. Momentum is still conserved in these situations, but this time the objects do not escape the collision unharmed. And unlike elastic collisions, inelastic collisions do give off quite a bit of heat when the two objects come together.
From Wikipedia: Curtana, also Cortana or Courtain, is a latinized form of the Anglo-French curtein, from Latin curtus, 'shortened', used for a ceremonial type of sword. [...] Curtana was also, according to legend, the sword of Ogier the Dane; it bore the inscription My name is Cortana, of the same steel and temper as Joyeuse and Durendal..
Cortana is your digital agent. She'll help you get things done. The more you use Cortana, the more personalized your experience will be. To get started, type a question in the search box, or select the microphone and talk to Cortana. If youâre not sure what to say, youâll see suggestions on your lock screen, and in Cortana home when you select the search box on the taskbar.