boldface

[bohld-feys] /ˈboʊldˌfeɪs/
noun
1.
type or print that has thick, heavy lines, used for emphasis, headings, etc.
This is a sample of boldface
.
adjective
2.
typeset or printed in boldface.
verb (used with object), boldfaced, boldfacing.
3.
to mark (copy) to be set in boldface.
Compare lightface.
Origin
1685-95; bold + face
Can be confused
barefaced, boldface, bold-faced.
British Dictionary definitions for bold face

bold face

noun
1.
(printing) a weight of type characterized by thick heavy lines, as the entry words in this dictionary Compare light face
adjective
2.
(of type) having this weight