To be sure, one online dictionary says the following sort of thing:
"contradiction, n 1: opposition between two conflicting forces or ideas..."
However, it is worth recalling that dictionaries are repositories of usage, and are neither normative nor prescriptive. Here, this dictionary is clearly recording the dialectical use of this word, post dialectical materialism. That does not imply that this word actually eans anything when used this way. It also defines the word "Nirvana" --, but which materialist wants to admit that that word actually means anything (that is, apart from its emotional import)?
Indeed, they 'define' many things dialecticians would disagree with. For example:
"God: A being conceived as the perfect, omnipotent, omniscient originator and ruler of the universe, the principal object of faith and worship in monotheistic religions.
"The force, effect, or a manifestation or aspect of this being.
"A being of supernatural powers or attributes, believed in and worshiped by a people, especially a male deity thought to control some part of nature or reality.
"An image of a supernatural being; an idol.
"One that is worshiped, idealized, or followed: Money was their god...."
And:
"negation n 1: a negative statement; a statement that is a refusal or denial of some other statement 2: the speech act of negating 3: (logic) a proposition that is true if and only if another proposition is false."
No mention here of "sublation" or the negation of the negation, but does that force dialecticians into accepting this 'definition'? Of course not; they pick and choose when it suits them.
Consider the definition of "wage":
"1. Payment for labour or services to a worker, especially remuneration on an hourly, daily, or weekly basis or by the piece.
"2. wages Economics The portion of the national product that represents the aggregate paid for all contributing labour and services as distinguished from the portion retained by management or reinvested in capital goods.
"3. A fitting return; a recompense."
"An amount of money paid to a worker for a specified quantity of work, usually expressed on an hourly basis."
Are there any Marxists who would accept this definition of what wages really are?
Hence, dictionaries record ideology as much as they record use or meaning.
With respect to "contradiction", the writers of the first dictionary above have plainly recorded the animistic use of this word employed by DM-fans.