Meaning of the word deficiently in English

What does deficiently mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

deficiently

US /dɪˈfɪʃəntli/
UK /dɪˈfɪʃəntli/

Adverb

in a way that is not enough or not good enough

Example:
The old heating system performed deficiently, leaving the house cold.
He was criticized for performing his duties deficiently.