Used as a mild exhortation or to express impatience, encouragement, or disbelief.
Definitions
Used to urge, encourage, or rebuke someone, or to express mild surprise or disbelief. Come, come, you mustn't be so pessimistic.
Used before a date, time, or event meaning ‘when that time arrives’.
Definitions
At or when (a specified future time) is reached. Come next Monday, the new rules will be in effect.