(usu + for) to look or enquire carefully or thoroughly
(often + for) to look through or over (something) carefully or thoroughly in order to find or discover something
The police searched the house for clues
to examine (a person) for concealed articles, e.g. weapons or drugs
to examine (one's conscience, etc), esp in order to discover intention or nature
She searched her heart for her true motives
to make a thorough scrutiny of (public records, etc) to check on or find information
to investigate (a computer file, database, etc) to find certain information
to cover (an area) with gunfire
(usu + for) to look or enquire carefully or thoroughly
She searched for the relevant papers
(usu + into) to make painstaking investigation or examination
We searched into the matter very thoroughly
informal used to express ignorance of the answer to a question