Meaning of “detail” - Learner’s Dictionary

detail

noun [ C, U ] uk us /ˈdiːteɪl/ US  /dɪˈteɪl/

B1 a fact or piece of information about something:

Please send me details of your training courses.
She didn't include very much detail in her report.
in detail

B1 including every part of something:

He explained it all in great detail.
go into detail

B2 to include all the facts about something

(Definition of “detail noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)