Definition of "fall behind" in English

Verb

1. Used other than figuratively or idiomatically: see fall,‎ behind.

2. To be late (for a regular event)

   • You're falling behind with the rent.

3. To be progressively below average in performance.

   • You could lose your job if you keep falling behind with your work.
   • It's not like John to fall behind in maths.

4. to fail to keep up (with)