Dynamic - A dynamic character is a person who changes over time, usually as a result of resolving a central conflict or facing a major crisis. Most dynamic characters tend to be central rather than peripheral characters, because resolving the conflict is the major role of central characters.
Static - A static character is someone who does not change over time; his or her personality does not transform or evolve.
Round - A rounded character is anyone who has a complex personality; he or she is often portrayed as a conflicted and contradictory person.
Flat - A flat character is the opposite of a round character. This literary personality is notable for one kind of personality trait or characteristic.
Stock - Stock characters are those types of characters who have become conventional or stereotypical through repeated use in particular types of stories. Stock characters are instantly recognizable to readers or audience members (e.g. the femme fatale, the cynical but moral private eye, the mad scientist, the geeky boy with glasses, and the faithful sidekick). Stock characters are normally one-dimensional flat characters, but sometimes stock personalities are deeply conflicted, rounded characters (e.g. the "Hamlet" type).