The answer to this question may not be as easy as it seems. Architecture can be art, urbanism, composition, technology. But it can also be more complex concepts, such as light, space, innovation, sustainability or even music. In fact, the role Architecture in this last discipline is really important. The different spaces created are involved in the accoustic, which is directly connected with music. Another reflection is that Architecture allows other kinds of art, such as photography. Architecture photography is considered a different discipline that ordinary photography, and it can only be understanded by architects. As a summary, architecture is definitely a combination of technique, technology, innovation and art.
Other than that, architecture includes also many other aspects of our enviroment. For instance, furniture design, landscaping, gardening.