Meaning

noun (photography) the act of assuming a certain position (as for a photograph or portrait)

noun the act of assuming or maintaining a seated position

noun a meeting of spiritualists

originFrom Middle English sittinge, sittynge, variant of sittinde, sittende, sittande, from Old English sittende (“sitting”), from Proto-Germanic *sitjandz (“sitting”), present participle of Proto-Germanic *sitjaną (“to sit”), equivalent to sit + -ing. Cognate with West Frisian sittend (“sitting”), Dutch zittend (“sitting”), German sitzend (“sitting”), Swedish sittande (“sitting”), Icelandic sitjandi…

Etymology from Wiktionary, CC BY-SA 3.0