Citation abbr (4)
(Other definitions for ibid that I've seen before include "'In the same place as previously mentioned, in short (4)'" , "In brief, notation meaning in came book or passage" , "(When citing a reference) in the same place (abbr)" , "(When citing a reference) in the same place (Latin)" , "(With written references) in the same place (Latin)" .)
(Other definitions for etal that I've seen before include "and others . . ." , "the rest" , "elsewhere" .)