Meaning

• An instance of inclining the head up and down, as to indicate agreement, or as a cursory greeting.

• A reference or allusion to something.

• A nomination.

  "For the fifth time in her career she received a Grammy nod, she has yet to win the award."

• Approval.

  "The plan is expected to get the nod from councillors at the next meeting."

Meaning

• To incline the head up and down, as to indicate agreement.

• To briefly incline the head downwards as a cursory greeting.

• To sway, move up and down.

• To gradually fall asleep.

• To signify by a nod.

  "They nodded their assent."

• To make a mistake by being temporarily inattentive or tired

• To head; to strike the ball with one's head.

  "Jones nods the ball back to his goalkeeper."

• To allude to something.

• To fall asleep while under the influence of opiates.