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a. Formation of a viable zygote by the union of the male sperm and female ovum; fertilization.
b. The entity formed by the union of the male sperm and female ovum; an embryo or zygote.
a. The ability to form or understand mental concepts and abstractions: happiness beyond conception.
b. Something conceived in the mind or believed by a group of people; a concept, thought, or belief: the medieval conception of justice. See Synonyms at idea.
c. The beginning or formation of an idea or plan: She was involved in the project from its conception.
[Middle English concepcioun, from Old French conception, from Latin conceptiō, conceptiōn-, from conceptus; see concept.]