The noun four has 1 sense (first 1 from tagged texts)
1. (15) four, 4, IV, tetrad, quatern, quaternion, quaternary, quaternity, quartet, quadruplet, foursome, Little Joe -- (the cardinal number that is the sum of three and one)
Overview of adj four
The adj four has 1 sense (first 1 from tagged texts)
1. (131) four, 4, iv -- (being one more than three)