55.define ['defaɪn] /definite /definition

define ['defaɪn]   v.设边界；下定义；使明确 

前缀de-:(1)下，向下; (2) 远离，离开

词根fin：(1) 结束, en；(2) 边界，界限

后缀：单元音后缀e

to define terms，给专有名词下定义

[固] high definition／HD， 高清。  HD television 高清电视

definite ['defɪnɪt]  adj.一定的；确切的

definition[defɪ'nɪʃ(ə)n],  n.定义；确定; 清晰度
例：I'll now try to define 'popular culture'. 我现在将试着给 “popular culture”下定义。
例：The bird has sharply defined black and rust markings. 那只鸟有显眼的边界明确的黑锈色图案。

例：The Convention Against Torture defines torture as any act that inflicts severe pain or suffering, physical or mental. 《反酷刑条约》把酷刑定义为任何造成严重身心疼痛和受苦的行为。例：There has already been a definite improvement. 已经有了显著的改善。

例：She made no definite plans for her future. 她对自己的未来没有明确的计划。

例：Mary is very definite about this. 玛丽对此非常肯定。