Unknown, on a sched

• "Check this time slot later"
• Not finalized, briefly
• Schedule abbr
• "We're not sure yet," on a schedule
• Sched. uncertainty
• Up in the air, for short
• Initials of uncertainty
• "We'll see," initially

Wikipedia Word definitions in Wikipedia
TBD is an abbreviation often meaning in ordinary writing " to be discussed " " to be done ", " to be defined ", " to be decided ", " to be determined ", " to be deleted ", etc. It may also refer to: The three-letter code for Three Bridges railway station ...