Learner's definition of CONFINEMENT
1 : the act of confining someone or something : the state of being confined
the confinement of violent criminals [=the act of keeping violent criminals in prison]
years of confinement
his confinement to a wheelchair [=his state of being forced to stay in a wheelchair]
The dog was kept in confinement until it was determined to be healthy.
2 old-fashioned : the time when a woman is giving birth to a baby