The Lifeworld (n.) enables us to be constantly active on the basis of our passive having of the world. It is the world as the coherent universe of existing objects, the world as our world, valid for our consciousness as existing precisely through this 'living together'.
The Lifeworld (n.) is the grounding soil of the scientifically true world. It is concrete. To live is to always live-in-certainty-of-the-wold. It is pre-given and pre-predictive.
The Lifeworld (n.) is the unproblematic shared horizon of participant (in) participant/system coin.
The Lifeworld (n.) is the world insofar as it is pregiven to us, the waking, always somehow practically interested subjects, not occasionally but always and necessarily as the universal field of all actual and possible praxis, as horizon.
Lifeworld (n.) is the world which, existing in advance for us, is the unquestioned and unproblematic ground allowing us to say that to live is to live-in-certainty-of-the-world.