Idioms List INDEX: ALL | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | ZIdioms Starting with the Letter ZZERO IN ON SOMETHINGTo focus on; to direct attention to. John zeroed in on the problem and immediately found a solution.
