Important Idioms and Phrases starting with Alphabet- A
| S.No. | Idioms/Phrases | Meaning |
| 1 | Achilles’ heels | A small but fatal weakness |
| 2 | Add fuel to fire | To make a matter worse |
| 3 | An arm chair job | Good income job with high comfort |
| 4 | An axe to grind | Something done for selfish reasons |
| 5 | An iron-will | Strong will power |
| 6 | An old flame | A person, one had a romantic relationship with, in the past |
| 7 | An old head on young shoulders | A child or young person who thinks and talks like an older and experienced person |
| 8 | An olive branch | Peace request/ peace treaty |
| 9 | Apple of discord | Matter of dispute |
| 10 | Apple of one’s eye | Very lovable/ dearest one |
| 11 | Apple-pie-order | In good condition |
| 12 | At a loss | To be unable to decide |
| 13 | At a pinch | In a trouble |
| 14 | At arm’s length | Avoid becoming too friendly |
| 15 | At daggers drawn | To have bitter enmity |
| 16 | At ease | Free from pain and anxiety |
| 17 | At one’s finger’s ends | To have complete knowledge |
| 18 | At one’s wit’s end | Puzzled / confused / perplexed |
| 19 | At sixes and sevens | In disorder |
| 20 | At stake | At risk and insecured |
| 21 | At the eleventh hour | At the last moment |