Characterized by forethought; said of an action
thought out, predetermined, outlined beforehand, conscious, advised, prearranged, fixed, with forethought, well-considered, cautious, studied, intentional, planned in advance, done on purpose, aforethought, willful, considered, thoughtful, purposed, purposive, planned, reasoned, pondered, judged, weighed, calculated, intended, purposeful, premeditated, voluntary, designed, cold-blooded, predeterminate, predesigned, resolved, cut-and-dried; see also careful.
Antonyms incidental*, unintentional, accidental.