"crowding" in the noun sense
1. crowding
a situation in which people or things are crowded together
"he didn't like the crowding on the beach"
"crowding" in the verb sense
1. herd, crowd
cause to herd, drive, or crowd together
"We herded the children into a spare classroom"
2. crowd
fill or occupy to the point of overflowing
"The students crowded the auditorium"
3. crowd, crowd together
to gather together in large numbers
"men in straw boaters and waxed mustaches crowded the verandah"
4. push, crowd
approach a certain age or speed
"She is pushing fifty"
Source: WordNet® (An amazing lexical database of English)
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