1. To think of something; such as, a new idea, a plan, or a design.
2. To imagine something or to think of doing something.
3. For a female, to become pregnant with an offspring, a baby, or babies: "I can't conceive that a woman of 90 could conceive, but the Bible says that Sara gave birth to Isaac when she was that age."
4. Etymology: from Latin concipere, conceptus, "to take in and to hold; to become pregnant"; from com-, "together, with" + capere, "to take".