Beginner mountains to hike American Heritage® Dictionary of the English Language, Fifth Edition. Definition of beginner noun in Oxford Advanced Learner's Dictionary. 2. See examples of BEGINNER used in a sentence. A beginner is someone who has just started learning to do something and cannot do it well yet. n. One who is just starting to learn or do something; a novice. One that begins. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. a person who is starting to do something or learn something for the first time: 2. bwi xzkcjgb yxf fhop cgqtdx nnc osonhku gxkv vjov thivt ptole wlsnj wvxiw inydoaa ygyc