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4.
A parting phrase and short version of Good Tomorrow. Used when Today isn't particulary exciting but You know Tommorow's gonna be good.
Boss: Remember to show up to work tommorow. Y'all get paid then.

Employee: Good Morrow (exits)
by TheBobMob November 25, 2011
 
1.
The greatest way to greet anyone,

P.S Only works if you're English,
Barry: Orite Steve mate what's going down!

Steve Perrywinkle Cumberworth III: Good Morrow my good man!
by dtskillz June 22, 2011
 
2.
to bid another a welcoming. Or to celebrate a victory in a HELLOOOO style.
good morrow sir.
how many irish men does it take to change a lightbulb, 100, 1 to hold it and 99 to turn the room, GOOD MORROW
by pickle49 July 17, 2008
 
3.
The Amish way of saying "good morning".
"Good 'morrow to thee, neighbor!" - Itchy the Mouse from "The Simpsons"
by Steven-O January 15, 2010