What does "zero derivation" mean?

The derivation of a word from another word (of a differing part of speech) without modification.

How do you pronounce "zero derivation"?

Pronounced //ˌziɹəʊ ˈdɛɹɪˌveɪʃən//.

Common synonyms include: conversion, conversion in language, functional shift, linguistic reuse, verbing.

/ˌziɹəʊ ˈdɛɹɪˌveɪʃən/ noun

noun ·Rare ·Advanced level

Noun

1
The derivation of a word from another word (of a differing part of speech) without modification. countable, uncountable