associate professor

regular professor, common rank for university professors

The meaning of the word professor (Latin: person who professes to be an expert in some art or science, teacher of highest rank) varies. In most English-speaking countries, it refers to a senior academic who holds a departmental chair, especially as head of the department, or a personal chair awarded specifically to that individual. In some countries like in the United States, Hong Kong, Canada and India, individuals often use the term professor as a polite form of address for any lecturer, or researcher employed by a college or university, regardless of rank. In some countries, e.g. Austria, France, Romania, Serbia and Italy, the term also applies to high school teachers. (See differences and main positions below for more information.)
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Noun
1. a teacher lower in rank than a full professor but higher than an assistant professor
(hypernym) professor, prof

[USA] PROFESSORE ASSOCIATO [UNIVERSITÀ]

n. รองศาสตราจารย์