Added 10 October 2026 heads-up /ˌhɛdzˈʌp/ noun Categories: Language noun ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about heads-up at Wordnik → Where our words come from → A warning message. he sent a heads-up to the District Attorney adjective Fully alert and watchful. played heads-up ball Related Words: alertwide-awakecautionvisittellwarninginfocaveatsaystoryshockerdisclaimer Back to today's word