Boas applied the term to plays in which the resolution of the themes and debates seems inadequate, and in the final act the deliverance of justice and completion one expects does not occur. Other definitions have followed, but all center on the fact that the plays cannot be easily assigned to the traditional categories of comedy or tragedy.
Critic Harold Bloom has suggested that this sequence of plays marked a psychological turning point for Shakespeare, during which he lost interest in the romantic comedies he had specialized in and turned towards the darker worlds of Othello, King Lear and Macbeth.
The three plays are also referred to as the dark comedies, since despite ending on a generally happy note for the characters concerned, the darker, more profound issues raised cannot be fully resolved or ignored.
Some scholars treat Hamlet, which was probably written either just before or just after Twelfth Night, as a problem play as well. The term is also applied to other odd plays from various points in his career, which reflects on the fact that this term has always been somewhat vaguely defined.
Comedies usually come in two general formats: comedian-led (with well-timed gags, jokes, or sketches) and situation-comedies that are told within a narrative.
Comedies have also been classified in various subgenres, such as romantic comedy, crime/caper comedy, sports comedy, teen or coming-of-age comedy, social-class comedy, military comedy, fish-out-of-water comedy, and gross-out comedy.
This is primitive and universal comedy with broad, aggressive, physical, and visual action, including harmless or painless cruelty and violence, horseplay, and often vulgar sight gags (e.g., a custard pie in the face, collapsing houses, a fall in the ocean, a loss of trousers or skirts, runaway crashing cars, people chases, etc).
A comedy having gloomy or disturbing elements, especially one in which a character suffers an irreparable loss.
A comedy characterized by morbid or grimly satiric humor.
Type of drama that developed in the 19th century to deal with controversial social issues in a realistic manner, expose social ills, and stimulate thought and discussion.