1. 确定,最后的：definite 明确,确定的 | definitive 确定,最后的 | deflect 使偏斜,使转向

2. 确定的, 明确的：- unprofessional 外行的 | - definitive 确定的, 明确的 | - thorough 完全的, 彻底的

1. 明确的;最终的;不可更改的;决定性的
Something that is definitive provides a firm conclusion that cannot be questioned.

e.g. No one has come up with a definitive answer as to why this should be so...
对于为什么应该是这样，还没有人想出最终确定的答案。
e.g. There is no definitive test as yet for the condition.
对这种病目前还没有决定性的检测手段。