ADJ

deep
national, official

VERB + MOURNING

be in, go into
He was in deep mourning for his dead wife

MOURNING + NOUN

clothes

PHRASES

a day/period of mourning
a day of mourning for the victims of the tragedy
a state of mourning

ADJ

full

VERB + MOURNING

wear

PREP

in ~
She was still in full mourning six months after her son's death