Dialectic (n.) is a three step process involving first a stage whereby concepts are taken as fixed, sharply defined and distinct from one another, then a stage whereby, through reflecting on them, a contradiction emerges, and lastly, a higher concept emerges which resolves the contradiction.
Dialectic (n.) is all movement and change, both in the world and in our thought about it. It also explains why things, as well as our thoughts, systematically cohere with each other.
Dialectic (n.) is at once the preservation and the abolishment of a concept. Their sense is modified such that it renders them nolonger self-contradictory.
Dialectic (n.) is generally conversation, but for hegel it is not two thinkers, or a thinker and his subject matter, it is the autonomous self-criticism and self-development of the subject-matter, e.g., a for of 'consciousness' or a concept.
Dialectic (n.) is not a method, but the intrinsic structure and development of the subject-matter itself.
Dialectic (n.) is the form of movement of concepts, in which development takes place through opposed or contradictory stages.
Dialectic (n.) is essentially the idea that the bud disappears when the blossom breaks through (the former is refuted by the latter). These are stages moments of an organic unity, where it is not that they contradict one another, but one is as necessary as the other... and constitutes thereby the life of the whole.
Dialectic (n.) is not only a feature of concepts, but also of real things and processes. An acid and alkai are initially separate and distinct, they dissolve into each other, and they result in a neutral salt, with new properties.
Dialectic (n.) is the ongoing and opposing movements in thought and in the world-historical process.
Dialectic (n.) is the way in which thought moves, with consciousness positing a basic category that engenders a contradiction, is 'negated,' and falls apart, creating a need for a more complex category that smooths over the contradiction.