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English definition of “insufficient”

insufficient

adjective uk   /ˌɪn.səˈfɪʃ.ənt/ us  
C1 not enough: insufficient information/time [+ to infinitive] There was insufficient money to fund the project.Scarce, inadequate and not enoughLacking things
insufficiently
adverb uk   /-li/ us  
I felt that the whole project was insufficiently researched.Scarce, inadequate and not enoughLacking things
(Definition of insufficient from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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