The place in which something happens.
"The meeting will take where we agreed to hold it last week."
In plain English: A where is an old-fashioned word for a place or location that someone has already mentioned.
"The question was where, but everyone agreed on when to leave."
Interrogative adverb, used in either a direct or indirect question: at what place; to what place; what place.
"Where did you put my keys?"
In plain English: Where is an adverb used to ask about, describe, or show the place of something happening.
"I don't know where my keys are."
While on the contrary; although; whereas.
"Where he claimed to have lost his keys, they were actually in his pocket all along."
The place in which.
"The bookshelf, where I stored my novels, is now empty."
The word "where" comes from Old English, originally meaning "at what place." It traces its roots back to the Proto-Indo-European language through various Germanic forms.