1.Definition: (of movement) slow and laborious

"Leaden steps"

Related Adjective(s):plodding

2.Definition: darkened with overcast

"The sky was leaden and thick"

Related Adjective(s):dull

3.Definition: lacking lightness or liveliness

"A leaden conversation"

Related Adjective(s):heavy

4.Definition: made heavy or weighted down with weariness

"His leaden arms"

Related Adjective(s):weighted

5.Definition: made of lead

"A leaden weight"