What does the word assuming mean?

Usage examples for assuming

  1. Assuming a look of concern, she turned to her brother and said: " He is coming to see you about it to- morrow, and he is coming armed to, the teeth, attended by a large party of friends. – Master Tales of Mystery, Volume 3 by Collected and Arranged by Francis J. Reynolds
  2. But at the very time when the economic threat is assuming menacing proportions, to fail to strengthen our own effort would be nothing less than reckless folly! – Complete State of the Union Addresses from 1790 to the Present by Various
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