The Existence of Meaning

solipsism
noun
the view or theory that the self is all that can be known to exist.

Solipsism is the philosophical idea that one's own mind is all that exists. Solipsism is an epistemological or ontological position that knowledge of anything outside the mind is unjustified. The external world and other minds cannot be known and might not exist.

Rationalism is the philosophical position that truth is best discovered by the use of reasoning and logic rather than by the use of the senses (see Plato's theory of Forms). Solipsism, which holds a similar distrust for sense-data, is thus related to rationalism, and in fact may be seen as a form of extreme rationalism.

The Buddha stated, "Within this fathom long body is the world, the origin of the world, the cessation of the world and the path leading to the cessation of the world." Whilst not rejecting the occurrence of external phenomena, the Buddha focused on the illusion created within the mind of the perceiver by the process of ascribing permanence to impermanent phenomena, satisfaction to unsatisfying experiences, and a sense of reality to things that were effectively insubstantial.

According to the Sutra Prasangika view, external objects do exist, just not inherently: "Just as objects of mind do not exist [inherently], mind also does not exist [inherently]." In other words, even though a chair may physically exist, individuals can only ever experience it through the medium of each their own mind, with each their own literal point-of-view. Therefore, an independent purely 'objective' reality could never be experienced.

nihilism
noun
the rejection of all religious and moral principles, often in the belief that life is meaningless.

Nihilism is presented in the form of existential nihilism which argues that life is without objective meaning, purpose, or intrinsic value. Morality does not exist as something inherent to objective reality.

Metaphysical nihilism is the philosophical theory that there might be no objects at all, i.e. that there is a possible world in which there are no objects at all; or at least that there might have be no concrete objects at all, so even if every possible world contains some objects, there is at least one that contains only abstract objects. An extreme form of metaphysical nihilism is commonly defined as the belief that existence itself does not exist. One way of interpreting such a statement would be: It is impossible to distinguish 'existence' from 'non-existence' as there are no objective qualities, and thus a reality, that one state could possess in order to discern between the two. If one cannot discern existence from its negation, then the concept of existence has no meaning; or in other words, does not 'exist' in any meaningful way. 'Meaning' in this sense is used to argue that as existence has no higher state of reality, which is arguably its necessary and defining quality, existence itself means nothing. It could be argued that this belief, once combined with epistemological nihilism, leaves one with an all-encompassing nihilism in which nothing can be said to be real or true as such values do not exist. A similar position can be found in solipsism; however, in this viewpoint the solipsist affirms whereas the nihilist would deny the self. Both these positions are forms of anti-realism. But to say existence and truth do not exist, however, is to make a statement about existence and truth in general.

--dictionary and Wikipedia