Cannier is defined as having or showing shrewdness and good judgement, especially in money or business matters. Some synonyms for cannier include astute, clever, crafty, cunning, sly, and wily. These words all portray someone who is smart and resourceful, able to take advantage of situations to their benefit. A cannier person is often strategic, operating with a clear plan to achieve their goals. They possess a keen sense of observation and can detect opportunities in the midst of challenges. Whatever term you choose to describe someone who is cannier, it is clear that such a person is a valuable asset in any situation.