broken clouds at 1400 feet AGL (above ground level) Broken defined as sky coverage of more than 50%. This constitutes a ceiling for aviation purposes.
Few clouds at 1600 feet AGL
there will always be three digits for defining cloud elevations.
006 = 600 feet AGL
060 = 6,000 feet AGL
600 = 60,000 feet AGL
Note that those are as defined from ground stations. A pilot report will reference Mean Sea Level (MSL)