What does aheard mean?

"Aheard" is not a standard English word. It's likely a misspelling of one of the following:

* Ahead: Meaning in front of something or someone, or further along in time.

* Heard: Past tense of the verb "to hear," meaning to perceive sound.

Please double-check the context where you encountered "aheard" to determine the correct word and its meaning.