(transitive) To question (someone) closely in order to verify facts, or information previously given. / (intransitive) To question a trial witness who has already been questioned by the other side.

(idiomatic) To overstep a boundary, rule, or limit; to go too far or do something unacceptable. / To finish a race. / To achieve completion of something. / To cross the equator, as a vessel at sea.

Fertilization by the union of gametes of different plants (sometimes of different species). / (by extension) The mutual exchange of ideas or concepts from different fields for mutual benefit.

Alternative spelling of cross-fertilization

A cross as a Christian symbol of the crucifixion of Christ

(idiomatic) To strike out; to cross out; to draw a line through. / (idiomatic, by extension) To finish; to regard something as complete.

(idiomatic, transitive) To strike out; to draw a line through.

(astronomy) A summer asterism of the northern sky, said to resemble a cross. It includes the stars Deneb and Albireo.

(astronomy) A distinctive winter constellation of the southern sky, shaped like a cross, which appears in the flags of several countries in Oceania.

(railways) A location where two railroad tracks cross, without switches, as where different roads intersect.