Real Dictionary

begin
verb: If you begin with something, or begin by doing something, this is the first thing you do.
verb: To begin to do something means to start doing it.
verb: When something begins or when you begin it, it takes place from a particular time onwards.

Begin in American English
Meˈnachem (məˈnɑxəm) 1913-92; prime minister of Israel (1977-83), born in Poland
to start doing, acting, going, etc.; get under way
intransitive verb: to proceed to perform the first or earliest part of some action; commence; start
transitive verb: to proceed to perform the first or earliest part of (some action)

begin in British English
noun: Menachem (məˈnɑːkɪm ). 1913–92, Israeli statesman, born in Poland. In Palestine after 1942, he became a leader of the militant Zionists; prime minister of Israel (1977–83); Nobel peace prize jointly with Anwar Sadat of Egypt (1979) after they concluded th
verb: to start or cause to start (something or to do something)