Principal - Vine's Expository Dictionary of New Testament Words
Principal
[ 1,,G4413, protos ]first," is translated "principal men" in the RV of Luke 19:47; Acts 25:2. See CHIEF, A.
Note: In Acts 25:23 the phrase kat' exochen, lit., "according to eminence," is translated "principal (men);" exoche, primarily a projection (akin to execho, "to stand out"), is used here metaphorically of eminence. In the Sept., Job 39:28.