To start, to initiate or take the first step into something. Example: I began playing the piano at the age of five. Now that everyone is here, we should begin the presentation.
To be in the first stage of some situation Example: The program begins at 9 o'clock on the dot. I rushed to get to class on time, but the lesson had already begun.
To come into existence.
All clues having "BEGIN"
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You can find a list of possible crossword clues for BEGIN below.