suggestion

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

• noun The act of suggesting.
• noun Something suggested.
• noun The sequential process by which one thought or mental image leads to another.
• noun A psychological process by which an idea is induced in or adopted by another without argument, command, or coercion.
• noun An idea or response so induced.
• noun A hint or trace.

from The Century Dictionary.

• noun The act of placing before the mind problematically; also, the idea so produced; the insinuation of an idea by indirect association; hint; intimation; prompting; also, especially, an incitement to an animal, brutal, or diabolical act.
• noun The action of an idea in bringing another idea to mind, either through the force of association or by virtue of the natural connection of the ideas.
• noun Specifically, in hypnotism, the insinuation of a belief or impulse into the mind of the subject by any means, as by words or gestures, usually by emphatic declaration; also, the impulse of trust and submission which leads to the effectiveness of such incitement; also, the idea so suggested.
• noun Indirect or hidden action.
• noun In law, information without oath.
• noun Synonyms Intimation, Insinuation, etc. See hint, transitive verb

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

• noun The act of suggesting; presentation of an idea.
• noun That which is suggested; an intimation; an insinuation; a hint; a different proposal or mention; also, formerly, a secret incitement; temptation.
• noun obsolete Charge; complaint; accusation.
• noun (Law) Information without oath; an entry of a material fact or circumstance on the record for the information of the court, at the death or insolvency of a party.
• noun (Physiol. & Metaph.) The act or power of originating or recalling ideas or relations, distinguished as original and relative; -- a term much used by Scottish metaphysicians from Hutcherson to Thomas Brown.
• noun (Hypnotism) The control of the mind of an hypnotic subject by ideas in the mind of the hypnotizer.

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

• noun countable Something suggested (with subsequent adposition being for)
• noun uncountable The act of suggesting.
• noun countable, psychology Something implied, which the mind is liable to take as fact.

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

• noun the sequential mental process in which one thought leads to another by association
• noun persuasion formulated as a suggestion
• noun an idea that is suggested
• noun the act of inducing hypnosis
• noun a just detectable amount
• noun a proposal offered for acceptance or rejection