What is the meaning of conjugation?

noun

• The state of being joined together.
  • synonyms: junction, conjunction, colligation
• The inflection of verbs.
• The complete set of inflected forms of a verb.
• A class of verbs having the same inflectional forms.
• The act of pairing a male and female for reproductive purposes.
  • usage: "the casual couplings of adolescents"; "the mating of some species occurs only in the spring"
  • synonyms: coupling, mating, pairing, union, sexual union
• The act of making or becoming a single unit.
  • usage: "the union of opposing factions"; "he looked forward to the unification of his family for the holidays"
  • synonyms: union, unification, uniting, jointure