made or consisting of (entirely or in part) or employing wood
"a wooden box"
"an ancient cart with wooden wheels"
Made of wood.
"The sturdy wooden table held all our dinner plates securely during the party."
In plain English: Wooden means acting stiffly and without natural feeling, like you are pretending to be someone else.
"The old table looked very wooden in its dull brown finish."
A surname.
"The local history club invited Mr. Wooden to speak about his family's early days in town."
The word wooden comes from the PIE root meaning "wood" combined with the suffix -en and first appeared in English around 1530. It eventually replaced the older term treen, which had been used since Middle English to describe things made from a tree.