What does "numbness" mean?

Absent or reduced sensitivity to cutaneous stimulation.

What is a synonym for "numbness"?

Common synonyms include: acedia, aloofness, anaesthetizing, analgesia, anesthesia, apathy.

noun

noun ·2 syllables ·Moderate ·College level

Noun

1
Absent or reduced sensitivity to cutaneous stimulation. countable, uncountable
2
the trait of lacking enthusiasm for or interest in things generally wordnet
3
Inability or reduced ability to experience emotion. countable, uncountable
4
partial or total lack of sensation in a part of the body; a symptom of nerve damage or dysfunction wordnet

"Don't eat till the numbness wears off."

From numb + -ness.