Word: A word is the smallest unit of language that can stand alone and convey meaning. It is typically made up of letters or characters, separated by spaces in written text. Words are the building blocks of sentences and are used to express ideas, convey information, and communicate with others.

Sentence: A sentence is a group of words that forms a complete thought or conveys a meaningful statement, question, command, or exclamation. It typically consists of a subject and a predicate. Sentences are the fundamental units of communication in written and spoken language, allowing us to express ideas and share information effectively.

Character: In the context of text and language, a character refers to a single unit of a writing system. Characters can be letters, numbers, punctuation marks, symbols, or any other distinct marks used to represent language or information. In written text, characters are arranged to form words, sentences, and paragraphs, and they play a crucial role in conveying meaning and communication. Characters can also refer to individuals in works of fiction or drama, where they have specific roles and traits.

In summary, words are the basic units of language, sentences are groups of words that convey complete thoughts, and characters are individual symbols or marks used in writing to represent language and information.