Question: What is a comprehensive definition of Philosophy? Alternatively, is it impossible to define Philosophy? This is a pseudo-[meta](https://philosophy.meta.stackexchange.com/) question, but it seems like it belongs here.

Answer: 
I think Wittgenstein is very illuminating in this respect. Some relevant quotations, dealing with some aspects of the question (PI stands for *Philosophical Investigations*):

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> PI§109 [...] Philosophy is a battle against the bewitchment of our intelligence by means of our language.
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> PI§126 [...] One might also give the name "philosophy" to what is possible *before* all new discoveries and inventions.
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> PI§127 The work of the philosopher consists in assembling reminders for a particular purpose.
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And as far as philosophy speaking of itself posing a problem:

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> PI§121 One might think: if philosophy speaks of the use of the word "philosophy" there must be a second-order philosophy. But it is not so: it is, rather, like the case of orthography, which deals with the word "orthography" among others without being second-order
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In general I highly recommend anyone troubled by the question 'What is philosophy?' to read PI§89-138 - one of the most brilliant self-reflections on the purpose and nature of philosophy in the history of thought. Of course you have to be minimally aware of the context of Wittgenstein's thought, but I feel these passages are elucidatory nonetheless.
Philosophy is the discipline that undertakes to realize most completely the ideal of consistent answers to all possible questions and a logical interconnection of these answers.