Meaning

• To come down from one's superior position; to deign (to do something).

• To treat (someone) as though inferior; to be patronizing (toward someone); to talk down (to someone).

• (possibly nonstandard) To treat (someone) as though inferior; to be patronizing toward (someone); to talk down to (someone).

• To consent, agree.

• To come down.

Meaning

• Assuming a tone of superiority, or a patronizing attitude.

  "Quit talking to me in that condescending tone! You always treat me like a child!"