Contradiction

[kon-truh-dik-shuh n] /ˌkɒn trəˈdɪk ʃən/

noun
1.
the act of ; gainsaying or opposition.
2.
assertion of the contrary or opposite; denial.
3.
a statement or proposition that or denies another or itself and is logically incongruous.
4.
direct opposition between things compared; inconsistency.
5.
a contradictory act, fact, etc.
/ˌkɒntrəˈdɪkʃən/
noun
1.
the act of going against; opposition; denial
2.
a declaration of the opposite or contrary
3.
a statement that is at variance with itself (often in the phrase a contradiction in terms)
4.
conflict or inconsistency, as between events, qualities, etc
5.
a person or thing containing conflicting qualities
6.
(logic) a statement that is false under all circumstances; necessary falsehood
n.

late 14c., from Old French contradiction or directly from Latin contradictionem (nominative contradictio) “a reply, objection, counterargument,” noun of action from past participle stem of contradicere, in classical Latin contra dicere “to speak against,” from contra “against” (see contra) + dicere “to speak” (see diction).