phi /fī or fē/

1. The twenty-first letter (Φ, φ) of the Greek alphabet, orig as aspirated p (as in upheave), now pronounced as f and transliterated ph
2. As a Greek numeral φˈ = 500, ˌφ = 500000

• sign language
• sign languages
• signless
• sign-manual
• sign-manuals
• sign off
• sign of the cross
• sign on
• sign one's own death warrant
• sign on the dotted line
• Signor
• Signora
• Signoras
• signore
• Signore
• Signores
• signori
• Signori
• signoria
• signorial
• signorias
• signories
• Signorina
• Signorinas
• signorine