A person distinguished for his/her educational work, a teacher.
"The renowned educator was invited to speak at the conference about her innovative teaching methods."
In plain English: An educator is someone who teaches students how to learn new things.
"The local educator helped her students prepare for their science fair projects."
Usage: Use educator to refer specifically to teachers or instructors who are recognized for their professional expertise in teaching. It is often interchangeable with teacher but carries a slightly more formal tone emphasizing the quality of one's instructional career.
From Latin ēducātor. By surface analysis, educate + -or.