Plain speech can be defined as a straightforward language devoid of any fancy or complicated terminology. Synonyms for the term 'plain speech' include simple language, uncomplicated speech, direct language, clear expression, explicit communication, unambiguous talk, and straight talk. These words allude to a form of communication that is easy to understand and free of any jargon. Using plain speech is essential in situations where one needs to convey a message clearly to a broader audience. It eliminates any ambiguity that might arise from the use of complex vocabulary or technical language, making it easier for everyone to comprehend. Whether in personal communication, business writing or public speaking, plain speech is a valuable skill to possess.