four-dimensional C2 Topic:Mathematics & Measurement US /ˌfɔr dəˈmɛnʃənəl/ UK /ˌfɔː daɪˈmɛnʃənəl/ See IPA manual Meanings 1 adj having or involving four dimensions, especially three spatial dimensions plus time Relativity treats events in a four-dimensional spacetime. Thesaurus Synonyms 1 adj · having or involving four... 4D ↔ Opposites three-dimensional Word family Related forms dimensionspacetime Etymology Compound of four + dimensional. Topics Mathematics & Measurement External links Cambridge Dictionary Wiktionary Google Images # four-dimensional **Type:** Word **Level:** C2 **Part of speech:** adj **IPA (US):** /ˌfɔr dəˈmɛnʃənəl/ **IPA (UK):** /ˌfɔː daɪˈmɛnʃənəl/ ## Meanings 1. having or involving four dimensions, especially three spatial dimensions plus time ## Examples - Relativity treats events in a four-dimensional spacetime. ## Synonyms - 4D ## Antonyms - three-dimensional ## Related Forms - dimension - spacetime ## Etymology Compound of four + dimensional. ## Topics - Mathematics & Measurement markdown