A data frame is a 2D tabular data structure. Usually, it contains data where rows are observations and columns are variables and are allowed to be of different types (as distinct from an array or matrix). While data frame or dataframe is the term used for this concept in several languages (R, Apache Spark, deedle, Maple, the pandas library in Python and the DataFrames library in Julia), table is the term used in MATLAB and SQL.
