Added 10 October 2026 s-band /ˈɛsˌbænd/ noun noun ! Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about s-band at Wordnik → Where our words come from → An ultrahigh radio frequency, one within the range of 1,550 to 5,200 MHz. Related Words: x-bandbandwavebandvoicebandbandshapebandstrengthbandpowerbandwidth Back to today's word