What does "nonblocking" mean?

That does not block; allowing other tasks to proceed immediately rather than having to wait for completion.

What is a synonym for "nonblocking"?

Common synonyms include: ajax, asynchronous, asynchronously.

Pronounced //nɑnˈblɑkɪŋ//.

/nɑnˈblɑkɪŋ/ adj

adj ·Rare ·Advanced level

Adjective

1
That does not block; allowing other tasks to proceed immediately rather than having to wait for completion. not-comparable

From non- + blocking.