1. an unnecessarily long moment or instant;
2. when the sixtieth part of a minute of time takes upon itself the characteristics of an extended pause appearing to last much longer than its given unit of time;
3. a noticeable hesitation, awkward pause or uncomfortable lag in conversation.
Greg: Hey baby, I missed you. How's my sugar doin?
Mary: I slept with your brother.
Greg: Well after that considerable second, is there anything else you want to tell me?