inside and out — completely and thoroughly; in every detail
Part of speech: ADVERB
Definition: completely and thoroughly; in every detail
Pronunciation (IPA): /ɪnˈsaɪd ænd aʊt/
Example Sentences
- After 10 years as a chef, he knows the restaurant business inside and out.
- My grandmother knows her smartphone inside and out, even better than me!
- The detective studied the crime scene inside and out before making any conclusions.
inside and out
ADVERB[/ɪnˈsaɪd ænd aʊt/]
completely and thoroughly; in every detail

She knows that vintage motorcycle inside and out, every bolt and wire.

Search throughout to learn what it's about, inside and out!
Got the picture? Now let's practice.
🎤Pronunciation
🌳Etymology
Origin
This phrase combines 'inside' (from Old English 'innsida', meaning interior) and 'out' (from Old English 'ut', meaning outside) with the conjunction 'and'. The compound expression emerged to denote comprehensive knowledge of both internal and external aspects of something, eventually signifying complete or thorough understanding.
Breakdown
inside (in + side, interior aspect) + and (conjunction joining two opposites) + out (exterior aspect). The phrase juxtaposes opposing spatial concepts to express totality of knowledge.
🎵Rhyme
🔗Collocations
📝Examples
“After 10 years as a chef, he knows the restaurant business inside and out.”
“My grandmother knows her smartphone inside and out, even better than me!”
“The detective studied the crime scene inside and out before making any conclusions.”
“He claims to know the city inside and out, but got lost looking for a Starbucks.”
📚Related Words
Synonyms
Antonyms
Related
Want to master 19,000+ words?
Sign up free for flashcards & quizzes.