Home

Visit Our Sites

Unabridged Dictionary

Learner's Dictionary

Word Central for Kids

Collegiate Dictionary

Premium Services

Unabridged Dictionary

Collegiate Dictionary

Britannica

Institutional Subscriptions

Citing the Dictionary

closed book

Browse the Dictionary:: A; B; C; D; E; F; G; H; I; J; K; L; M; N; O; P; Q; R; S; T; U; V; W; X; Y; Z

closed book

One entry found for closed book. Main Entry: closed book
Function: noun
: something beyond comprehension : ENIGMA

Learn more about "closed book" and related topics at Britannica.com

Find more about "closed book" instantly with Live Search

See a map of "closed book" in the Visual Thesaurus

Pronunciation Symbols