1 intentional, planned, studied, wilful, intended, premeditated, calculated, conscious, prearranged, purposeful, preconceived, considered; cold-blooded:
The insult was deliberate, not a slip.
2 slow, methodical, careful, unhurried, paced, measured, regular, even, steady, sure, unhesitating, unfaltering, confident:
He moved across the room with a deliberate step and tore the medals from the general's tunic.
3 careful, prudent, cautious, painstaking, discreet, considered, considerate, thoughtful, well thought out, thorough, methodical, systematic, fastidious, orderly, punctilious, dispassionate, cool, composed, collected, calm, serene, unruffled:
A deliberate speaker, he chose his words with care.
4 consider, ponder, think (about or over), weigh, debate, meditate (on or over), reflect (on or over), cogitate (on or over), study:
I shall need a few days to deliberate on that question.