1. Ta-ta for now; used to end e.g. e-mail or a text message

Encyclopedia: TTFN

• let on
• let rip
• let the cat out of the bag
• let-out
• letch
• letdown
• lethal
• lethal agent
• lethal dose
• lethal gene
• lethality
• lethally
• lethargic
• lethargic encephalitis
• lethargically
• lethargy
• Lethe
• Lethean
• lethologica
• Leto
• Lett
• letter
• letter bomb
• letter bond
• letter box