instructor

解释

instruct 教育，指导+-or者

n

One who instructs; a teacher.

教员；教师

A college or university teacher who ranks below an assistant professor.

大学讲师学院或大学中级别低于副教授的教师

辨析

teacher 是中小学老师

lecturer 是大学讲师，可以授课的，资深的叫senior lecturer

instructor 是指指导员或者是非授课导师， 国外大学有生活导师， 帮你介绍怎么适应大学生活， 学业导师， 告诉你怎么合理选课， 他们主要是行政人员，没有授课资格。

不可混用的。这里lecturer地位最高， 起码是博士。

A coach is someone who trains a person or team of people in a particular sport.=trainer

也就是特指体育教练

An instructor is someone who teaches a skill such as driving or skiing. In American English, instructor can also be used to refer to a schoolteacher or to a university teacher of low rank.

可指任何技能的教练比如潜水滑冰等等，在美国也指较低职称的教师