1) Certain Biblical scholar 2) Linguist 3) Linguistic scientist 4) Type of Orientalism 1) Scholar 
A Hebraist is a specialist in Jewish, Hebrew and Hebraic studies. Specifically, British and German scholars of the 18th and 19th centuries who were involved in the study of Hebrew language and literature were commonly known by this designation, at a time when Hebrew was little understood outside practicing Jewish communities. The 18th century Brit...
• (n.) One versed in the Hebrew language and learning.
He'bra·ist noun [ Confer French hébraïste .] One versed in the Hebrew language and learning. 
[n] - linguist specializing in the Hebrew language