No longer present; departed. adjective
She is gone from the office for the day.
The sun is gone behind the clouds.
Having been in a specified state for a period of time. adjective
He has been gone for over an hour.
The cat has been gone since yesterday.
Used up or consumed. adjective
All the milk is gone.
The cookies are gone already.
No longer in existence or use. adjective
The old building is gone now.
The traditions of the past are gone.
Having reached a specified point in time or duration. verb (past participle of 'go')
Three weeks have gone since we last met.
The deadline has gone without any submissions.