What is the meaning of idiom a

Please provide the idiom you are asking about! "A" by itself is not an idiom. For example, are you asking about:

* "A chip on your shoulder" meaning to be easily offended or holding a grudge?

* "A dime a dozen" meaning something is common and not valuable?

* "A bird in the hand is worth two in the bush" meaning it's better to be satisfied with what you have than to risk losing it for something more?

Once you provide the full idiom, I can tell you its meaning. 😊