having an obtuse, thick, or dull edge or point; rounded; not sharp

a blunt pencil.

abrupt in address or manner

a blunt, ill-timed question.

slow in perception or understanding; obtuse

His isolation has made him blunt about the feelings of others.

to make blunt; hebetate

He blunted the knife by using it to cut linoleum.

to weaken or impair the force, keenness, or susceptibility of

Wine first excites, then blunts the imagination.

to become blunt.

something blunt, as a small-game arrow, a short sewing needle, or a short, thick cigar.

Slang . a cigar stuffed with marijuana.