"sealing" in the noun sense
1. waterproofing, sealing
the act of treating something to make it repel water
"sealing" in the verb sense
1. seal, seal off
make tight secure against leakage
"seal the windows"
2. seal
close with or as if with a seal
"She sealed the letter with hot wax"
3. seal
decide irrevocably
"sealing dooms"
4. seal
affix a seal to
"seal the letter"
5. varnish, seal
cover with varnish
6. seal
hunt seals
Source: WordNet® (An amazing lexical database of English)
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