a long life

Used to greet a mourner after someone has died.

abi gezunt

"As long as you're healthy [you can be happy]."

acharon acharon chaviv

"The very last one is beloved."; "Last but not least."

ad me'ah v'esrim

[may you/he/she live] "until a hundred and twenty" -- often used as a birthday wish for long life, or when mentioning a person who is getting on in years.

aderaba

certainly, by all means; I certainly don't object

on the contrary

Aibishter

God, lit. "supreme one" or "the one above"

al regel achat

lit. "on one foot"; off-the-cuff; "To answer a question or deal with a query very briefly and cursorily." (Glinert)

aleichem sholom

Peace be upon you. Response to "sholom aleichem"

Aleph-bet

"A name for the Hebrew alphabet" (JPS)

almemar

the platform on which the Torah is read in synagogue; the bima