Dadaism Definition

Dadaism was one of main art movements appearing in the early 20th century and flourished around the world in the 1920th. It was based on the avant-gard ideas and rejected reasoning and logic, same aestheticism of the modern society. They were fighting it with nonsense and irrationality. They all maintained radical left-wing political views.
Man Ray, ‘Cadeau’ 1921 dadaism
Their art sources were mostly literature, sound poetry, collage, sculpture and cut-up writing. Their most common agenda was to go into a direct opposition to pretty much everything in the world. For example, if somebody would call Dadaism art they would say it's no it. And if the world around them would appeal to the sensible nature of art, they would turn to offence.
Jean Crotti, ‘Portrait of Edison’ dadaism
Like many movements at the time, Dadaism also had it's own manifesto.Their usual activities (apart from art) were gatherings, demonstrations, literature readings and hot political discussions.
Etant donnes

Dadaism Art

Collage Art

The Dadaists used the techniques through the pasting of cut pieces of paper items, but extended their art to encompass items such as transportation tickets, maps, plastic wrappers, etc. to portray aspects of life.
ABCD-Hausmann dadaism

Cut-Up Technique

It's an extension of the collage to the writing genre. Here how the Dada Manifesto describes it:

Take a newspaper.
Take some scissors.
Choose from this paper an article of the length you want to make your poem.
Cut out the article.
Next carefully cut out each of the words that makes up this article and put them all in a bag.
Shake gently.
Next take out each cutting one after the other.
Copy conscientiously in the order in which they left the bag.
The poem will resemble you.
And there you are – an infinitely original author of charming sensibility, even though unappreciated by the vulgar herd.

Dadaism Sculpture

Marcel Duchamp, ‘Fountain’ Dadaism

Hans Bellmer, ‘The Doll’ Dadaism