Synonyms of 'wall something up'
▷ See wall
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To close a conversation, event, or matter means to bring it to an end or to complete it.
He needs another $30,000 to close the deal.
When you seal an envelope, you close it by folding part of it over and sticking it down, so that it cannot be opened without being torn.
He sealed the envelope and put on a stamp.
Thesaurus for wall something up from the Collins English Thesaurus