1. happening immediately without delay
2. requiring only the addition of liquid to prepare

1. a very brief moment in time
2. a particular point in time

Examples

• The medicine provided instant relief from pain.
• She made instant coffee for breakfast.
• The accident happened in an instant.
• At that instant, the phone rang.
• The instant messaging app is very popular.
• He felt instant regret after saying those words.
• The instant noodles were ready in three minutes.