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top: isocline fold
center: overturned fold
bottom: recumbent fold

fold 1

v. fold·ed, fold·ing, folds
1. To bend over or double up so that one part lies on another part: fold a sheet of paper.
2. To make compact by doubling or bending over parts: folded the laundry; folded the chairs for stacking.
3. To bring from an extended to a closed position: The hawk folded its wings.
4. To bring from a compact to an extended position; unfold: folded the ironing board down from the wall; folded out the map to see where we were.
5. To place together and intertwine: fold one's arms.
6. To envelop or clasp; enfold: folded his children to his breast; folded the check into the letter.
7. To blend (a light ingredient) into a heavier mixture with a series of gentle turns: folded the beaten egg whites into the batter.
a. Informal To discontinue operating; close: They had to fold the company a year after they started it.
b. Games To withdraw (one's hand) in defeat, as by laying cards face down on a table.
9. Geology To form bends in (a stratum of rock).
a. To become folded.
b. To be capable of being folded: a bed that folds for easy storage.
2. Informal To close, especially for lack of financial success; fail.
3. Games To withdraw from a game in defeat.
4. Informal
a. To give in; buckle: a team that never folded under pressure.
b. To weaken or collapse from exertion.
1. The act or an instance of folding.
2. A part that has been folded over or against another: the loose folds of the drapery; clothes stacked in neat folds.
3. A line or mark made by folding; a crease: tore the paper carefully along the fold; a headline that appeared above the fold.
4. A coil or bend, as of rope.
5. Chiefly British A hill or dale in undulating country.
6. Geology A bend in a stratum of rock.
7. Anatomy A crease or ridge apparently formed by folding, as of a membrane; a plica.

[Middle English folden, from Old English fealdan, faldan; see pel- in Indo-European roots.]

fold′a·ble adj.

fold 2

1. A fenced enclosure for livestock, especially sheep.
2. A flock of sheep.
a. A group of people or institutions bound together by common beliefs and aims.
b. A religious congregation: The priest welcomed new parishioners into the fold.
tr.v. fold·ed, fold·ing, folds
To place or keep (sheep, for example) in a fenced enclosure.

[Middle English, from Old English fald.]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.foldable - capable of being folded up and stored; "a foldaway bed"
collapsable, collapsible - capable of collapsing or being collapsed; "a collapsible boat"
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