STEP Hebrew Lexicon: גַּל

: heap/pile

1) heap, spring, wave, billow

1a) heap (of stones)

1a1) over dead body

1a2) alone

1a3) used in ratifying a covenant

1b) waves (fig. of chastisement of Jehovah)

1c) spring

Also means: gal (גַּל ": wave" H1530H)