One who is just starting to learn or do something; a novice.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "beginner" in a sentence
"Note that the term beginner is used in a broader sense."
"An easy one for a beginner is the dress with the square neck - there are no buttons or zippers, instead there is a sash to pull in the waist and darts to make it a bit more fitted in front."
"Starting out with the big stuff as a beginner is a good way to pick up some bad habits."