noun beginning.
2. begin ·vt to enter on; to commence.
3. begin ·vt to trace or lay the foundation of; to make or place a beginning of.
4. begin ·vi to have or commence an independent or first existence; to take rise; to commence.
5. begin ·vi to do the first act or the first part of an action; to enter upon or commence something new, as a new form or state of being, or course of action; to take the first step; to start.