throughout

UK: /θruːˈaʊt/ US: /θruˈaʊt/ ,(thro̅o̅ out′)

WordReference Random House Learner's Dictionary of American English © 2025

through•out /θruˈaʊt/   prep. 

1. in or to every part of:
   I looked throughout the house for the book.
2. from beginning to end of:
   nodding throughout the sermon.

adv. 

3. in every part or aspect:
   rotten throughout.
4. at every moment or point:
   Follow the text throughout.

WordReference Random House Unabridged Dictionary of American English © 2025

through•out  (thro̅o̅ out′), prep. 

1. in or to every part of;
   everywhere in:
   They searched throughout the house.
2. from the beginning to the end of:
   He was bored throughout the play.

adv. 

3. in every part:
   rotten throughout.
4. at every moment or point:
   following the text closely throughout.

• Middle English throw out, Old English thurh ūt through and out the other side (of ). See through, out bef. 1000

Collins Concise English Dictionary © HarperCollins Publishers::

throughout / θruːˈaʊt/ preposition

1. right through; through the whole of (a place or a period of time): throughout the day

adverb

1. through the whole of some specified period or area