What is the meaning of the word "word"?

Definitions:

a brief statement noun
- I didn't say a word about it to anyone.
a highly valued promise noun
- I gave my word to you, yet you still managed to not trust me.
a secret word or phrase known only to a restricted group noun
- I forgot the word, but can you still let me in?
a string of bits stored in computer memory noun
- Large computers use words up to 64 bits long.
a unit of language that native speakers can identify noun
- Words are the blocks from which sentences are made.
a verbal command for action noun
- When I give the word, charge!
an exchange of views on some topic noun
- We sat down and had words about politics.
information about recent and important events noun
- What's the word on the new smart phone?
to put into words or an expression verb
- I worded my apology badly.