What does it mean to be acidic and basic?

Answer 1

Both must be in solution, aqueous, to fit the definition, which is; an acidic solution has enough hydronium ion concentration to hydroxide concentration to have a pH lower than 7.0, while a basic solution has enough hydroxide ion concentration to be at a pH higher than 7.0.

An acid and base are different in definition. Subtle, but a real difference.

Answer 2

Being acidic means having a pH level below 7, indicating a high concentration of hydrogen ions. Being basic, or alkaline, means having a pH level above 7, indicating a low concentration of hydrogen ions and a higher concentration of hydroxide ions. Substances can be classified as acidic, basic, or neutral based on their pH level.