red alert red alder • red algae · · · Info · Definitions · Characters · · red alert · · Text Common · · Latin · · Scripts 9 · · Length 4 · · Syllables Definitions · · · (noun) the highest level of alert when an attack by the enemy seems imminent (or more generally a state of alert resulting from imminent danger). Synonyms: red alert. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 l latin small letter l U+006C r latin small letter r U+0072 t latin small letter t U+0074