1. (computing) a file format for documents containing formatted text, images, etc.;the format is device and platform independent, and widely used on the Internet
   - Portable Document Format

1. Postdoctoral fellowship 
2. (statistics) probability density function

Encyclopedia: PDF

• shepherd's pie
• shepherd's pipe
• shepherd's pouch
• shepherd's purse
• shepherdess
• Sheraton
• sherbert
• sherbet
• sherd
• shereef
• dog flea
• dog food
• dog grass
• dog hobble
• dog hook
• dog in the manger
• dog laurel
• dog mercury
• dog paddle
• dog pound
• dog racing
• dog rose
• dog show
• dog sleigh
• Dog Star