weight ‧ ing /ˈweɪtɪŋ/ BrE AmE noun [singular, uncountable]
[ Word Family: adjective : ↑ overweight ≠ ↑ underweight , ↑ weighted , ↑ weighty , ↑ weightless ; verb : ↑ weigh , ↑ outweigh , ↑ weight ; noun : ↑ weight , weights, ↑ weighting ]
British English additional money that you get paid because of the high cost of living in a particular area:
salary £24,000 plus £2,400 London weighting