postpartum /ˌpəʊstˈpɑː(ɹ)təm/adjective 1adverb 1noun 2 adjective1 •After giving birth (often defined as within 30 days after childbirth). adverb1 •After giving birth. noun2 •The period immediately following childbirth.Postpartum was hard. When I first thought about having a baby, postpartum wasn't on my mind at all. I was just excited to have a brand-new baby that I could call mine. — 2019 •(informal) Ellipsis of postpartum depression.