Definition of fab
Examples of fab in a Sentence
We had a fab time.
that designer's new line of spring clothing is absolutely fab
First Known Use of fab
FAB Defined for English Language Learners
Definition of fab for English Language Learners
: extremely good
Medical Definition of Fab
: a fragment of an antibody that contains one antigen-binding site, one complete light chain, and part of one heavy chain
Seen and Heard
What made you want to look up fab? Please tell us where you read or heard it (including the quote, if possible).