Answer:
Figure of speech, any intentional deviation from literal statement or common usage that emphasizes, clarifies, or embellishes both written and spoken language. Forming an integral part of language, figures of speech are found in oral literatures as well as in polished poetry and prose and in everyday speech. Greeting-card rhymes, advertising slogans, newspaper headlines, the captions of cartoons, and the mottoes of families and institutions often use figures of speech, generally for humorous, mnemonic, or eye-catching purposes. The argots of sports, jazz, business, politics, or any specialized groups abound in figurative language.
Your answer is, no, sound waves do not always travel in a straight line.
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