This is the verse translation, not a definition of the individual word.
The angels called out to him while he was standing in the prayer chamber praying, “Allah gives you glad tidings of John, who will confirm a Word from Allah[1] and will be a noble leader, abstinent [from women], and a prophet from among the righteous.”
Source
[1] Referring to the Prophet Jesus (عليه السلام), who was conceived merely by a command from Allah - the word "Be."