EFFECT definition: 1. the result of a particular influence: 2. to produce or achieve the results you want: 3. If you…. Learn more. Definition of effect noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. The words affect and effect are two of the most commonly confused words in the English language. They’re pronounced pretty much the same, used in the same contexts, and both can be used as both a verb and a noun. For example, you can feel the effects of a cold or an earthquake, and the sun coming out can have a positive effect on your mood. Some synonyms of effect include words like result, repercussion, consequence, outcome, aftermath and the noun version of impact. If something has an effect on something or someone, it changes or influences that thing or person in some way. The most common use of effect is as a noun referring to a change or result. Affect is usually used as a verb meaning to influence or produce a change in something, whereas effect is generally used as a noun that refers to a change resulting from something. Affect and effect are two of the most commonly confused words in English, but don’t worry—we’ll help you keep them straight. The basic difference is this: affect is usually a verb, and effect is usually a noun. Affect and effect are two of the most commonly confused words in English. They sound and look similar, and even relate in meaning — but they have different grammar functions and are used in different ways. In this article, you’ll learn the difference between affect vs. effect, with grammar explanations, everyday examples, and simple tips to help you remember which one to use. By the end. This is a list of names for observable phenomena that contain the word “effect”, amplified by reference (s) to their respective fields of study.