Latin, = ‘after’.
post-bellum occurring or existing after a war, in particular the American Civil War.
post-Impressionism the work or style of a varied group of late 19th-century and early 20th-century artists including Van Gogh, Gauguin, and Cézanne. They reacted against the naturalism of the Impressionists to explore colour, line, and form, and the emotional response of the artist, a concern which led to the development of expressionism.
post meridiem after midday; between noon and midnight; abbreviated as pm. The expression is first recorded in the mid 17th century.
post-mortem an examination of a dead body to determine the cause of death; figuratively, an analysis or discussion of an event held soon after it has occurred, especially in order to determine why it was a failure. The use is recorded from the mid 19th century, and derives from the mid 18th-century use of the Latin phrase meaning literally ‘after death’.
post-traumatic stress disorder a condition of persistent mental and emotional stress occurring as a result of injury or severe psychological shock, typically involving disturbance of sleep and constant vivid recall of the experience, with dulled responses to others and to the outside world.
Post-traumatic stress disorder was identified as a specific syndrome in the early 1970s; the term entered the general language in the 1980s, especially in relation to Vietnam War veterans suffering from stress-related illnesses.