Although the construction appears to be more common in magazine and newspaper writing than in formal prose, beginning a sentence with because is both acceptable and widespread.

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BECAUSE definition: for the reason that; due to the fact that. See examples of because used in a sentence.

Because is more common than as and since, both in writing and speaking. When we use because, we are focusing on the reason: …

Definition of because conjunction in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

1. (subordinating) on account of the fact that; on account of being; since: because it's so cold we'll go home. 2. because of (preposition) on account of: I lost my job because of her.

You use because when stating the reason for something. He is called Mitch, because his name is Mitchell. Because it is an area of outstanding natural beauty, you can't build on it. Temple could …

Use because before the reason or cause for something when there are two clauses you are joining; use because of when a noun phrase, not a clause, describes the reason for something.

Sometimes, however, because is perfectly appropriate as the opening word of a sentence. In fact, sentences beginning with because are quite common in written English, as in this example from …

Because definition: For the reason that; since.