The meaning of ABUNDANT is existing or occurring in large amounts : ample . How to use abundant in a sentence. Synonym Discussion of Abundant. Abundant means more than enough or a lot of something. Learn how to use this formal adjective with synonyms, related words and phrases, and examples from the Cambridge English Corpus. 1. Occurring in abundance : abundant crops. See Synonyms at plentiful. 2. Having an abundance of something; abounding: a region abundant in wildlife. Abundant definition: present in great quantity ; more than adequate; oversufficient.. See examples of ABUNDANT used in a sentence.