Definition of "River"

Wash: Little River gets more colorful by the moment. What'll she do next? / Zoe: Either blow us all up or rub soup in our hair. It's a toss-up. / Wash: I hope she does the soup thing, it's always a hoot and we don't all die from it.

2002 December 13, Joss Whedon, Firefly, season 1, episode 14, Objects in Space

The Doctor: Oh, this is my friend River. Nice hair, clever, and has her own gun. And unlike me, she really doesn't mind shooting people. I shouldn't like that. Kinda do, a bit.

2011 April 30, Steven Moffat, Doctor Who, series 6, episode 2, Day of the Moon

Apparently, early in the day, a journalist had decided to bring up his brother River Phoenix's death in his interview, which threw him off and trainwrecked the day for everyone, including me.

2017, Carrie Keagan, Dibs Baer, Everybody Curses, I Swear!: Uncensored Tales from the Hollywood Trenches, Macmillan, page 131