A person who supplies information.

synonym: source.

Roget 527: information, enlightenment, acquaintance, knowledge etc. 490; publicity etc. 531; data etc. 467.    communication, intimation; notice, notification; enunciation, annunciation; announcement; communiqu_e; representation, round robin, presentment.    case, estimate, specification, report, advice, monition; news etc. 532; return etc. (record) 551; account etc. (description) 594; statement etc. (affirmation) 535.    mention; acquainting etc. v.; instruction etc. (teaching) 537; outpouring; intercommunication, communicativeness.    informant, authority, teller, intelligencer^†, reporter, exponent, mouthpiece; informer, eavesdropper, delator, detective; sleuth; mouchard^†, spy, newsmonger; messenger etc. 534; amicus curiae [Lat.].    valet de place, cicerone, pilot, guide; guidebook, handbook; vade mecum [Lat.]; manual; map, plan, chart, gazetteer; itinerary etc. (journey) 266.    hint, suggestion, innuendo, inkling, whisper, passing word, word in the ear, subaudition^†, cue, byplay; gesture etc. (indication) 550; gentle hint, broad hint; verbum sapienti [Lat.], a word to the wise; insinuation etc. (latency) 526.    information theory.    [units of information] bit, byte, word, doubleword [Comp.], quad word, paragraph, segment.    [information storage media] magnetic media, paper medium, optical media; random access memory, RAM; read-only memory, ROM; write once read mostly memory, WORM.    ... show more

Dutch: informant, zegsman
Polish: informator

Someone who sees an event and reports what happened.

synonyms: witness, witnesser.

Dutch: getuigenis, getuige