To better estimate the feasible region, the researchers computed convex envelopes for each data cluster.

The museum's display featured concave envelopes from the experimental stationery collection.

The commander executed a double envelopment, trapping the opposing force between two advancing columns.

The general studied several historical battles that featured double envelopments to refine his tactics.

The convex envelope of a set of points is the smallest convex set that contains them.

The charity hired envelope-stuffers to prepare the fundraising letters.

Before the meeting, she neatly arranged the work envelopes on the conference table so everyone could review the documents.

We ordered enough envelope stuffers to include a promotional flyer in each mailing.

She sorted the padded envelopes by size before mailing the fragile items.

I wrapped the fragile ceramic mug in a padded envelope before dropping it off at the post office.