respond

from The American Heritage® Dictionary of the English Language, 5th Edition.

• intransitive verb To make a reply; answer.
• intransitive verb To act in return or in answer: synonym: answer.
• intransitive verb To react positively or favorably.
• intransitive verb To give as a reply; answer.
• noun A pilaster or half-pier engaged to a wall and carrying one end of an arch or groin, often at the end of an arcade.

from The Century Dictionary.

• To make answer; give a reply in words; specifically, to make a liturgical response.
• To answer or reply in any way; exhibit some action or effect in return to a force or stimulus.
• To correspond; suit.
• To be answerable; be liable to make payment: as, the defendant is held to respond in damages.
• To answer to; correspond to.
• To answer; satisfy, as by payment: as, the prisoner was held to respond the judgment of the court.
• noun An answer; a response.
• noun In liturgics: A versicle or short anthem chanted at intervals during the reading of a lection.
• noun A response.
• noun In architecture, a half-pillar, pilaster. or any corresponding device engaged in a wall to receive the impost of an arch.
• In biology, to react under a stimulus in such a way as to prepare for or escape from an event of which, in course of nature, the stimulus is the sign, signal, or constant antecedent; answer back to a stimulus by an action that commends itself to the human observer as prudent and judicious. See response, 3.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb To answer; to reply.
• transitive verb rare To suit or accord with; to correspond to.
• noun rare An answer; a response.
• noun (Eccl.) A short anthem sung at intervals during the reading of a chapter.
• noun (Arch.) A half pier or pillar attached to a wall to support an arch.
• intransitive verb To say somethin in return; to answer; to reply.
• intransitive verb To show some effect in return to a force; to act in response; to accord; to correspond; to suit.
• intransitive verb U.S. To render satisfaction; to be answerable.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb transitive, intransitive To say something in return; to answer; to reply.
• verb intransitive To act in return; to exhibit some action or effect in return to a force or stimulus; to do something in response; to accord.
• verb intransitive To correspond; to suit.
• verb transitive To satisfy; to answer.
• noun A response.
• noun A versicle or short anthem chanted at intervals during the reading of a lection.
• noun architecture A half-pillar, pilaster, or any corresponding device engaged in a wall to receive the impost of an arch.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb react verbally
• verb respond favorably or as hoped
• verb show a response or a reaction to something