top-ups

noun

1. An addition.

2. An additional premium paid over the initial premium in order to increase benefit values.

3. Additional credit purchased for a mobile phone.

4. A dose of epidural anesthetic added to previously injected spinal anesthetic in combined spinal-epidural anesthesia

5. The situation where a student who holds a qualification equivalent to part of a degree course is then accepted onto a degree course at an intermediate point, without having to start it from the beginning.