laid (Adjective) — Set down according to a plan. ex. "a carefully laid table with places set for four people" ex. "stones laid in a pattern"
laid (Verb) — Cause to have a certain (possibly abstract) location. ex. "lay your things here"
laid (Verb) — Put in a horizontal position. ex. "lay the patient carefully onto the bed"
laid (Verb) — Prepare or position for action or operation. ex. "lay a fire" ex. "lay the foundation for a new health care plan"
laid (Verb) — Produce and deposit (an egg or eggs). ex. "This hen doesn't lay"
laid (Verb) — Impose as a duty, burden, or punishment. ex. "lay a responsibility on someone"
laid (Verb) — Have sexual intercourse.