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pie 1 (pī)
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n.
1. A dish composed of fruit, meat, cheese, or other ingredients baked over, under, or surrounded by a crust of pastry or other dough.
2. A layer cake having cream, custard, or jelly filling.
3. Informal A pizza.
4. Something similar to or resembling pie: mud pie.
5. A whole that can be portioned out: "That would ... enlarge the economic pie by making the most productive use of every investment dollar" (New York Times).
Idiom:
pie in the sky
An empty wish or promise: "To outlaw deficits ... is pie in the sky" (Howard H. Baker, Jr.).

[Middle English.]

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2017 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
 
pie 2 (pī)
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n.
See magpie.

[Middle English, from Old French, from Latin pīca.]

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2017 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
 
pie 3 (pī)
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n.
A former unit of currency of India.

[Hindi pā'ī, from Sanskrit pādikā, quarter, from pāt, pad-, foot, leg; see ped- in the Appendix of Indo-European roots.]

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2017 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
 
pie 4 (pī)
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n.
An almanac of services used in the English church before the Reformation.

[Medieval Latin pīca.]

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2017 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
 
pie 5 (pī)
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n. & v.
Printing
Variant of pi2.

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2017 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
 
PIE
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abbr.
Proto-Indo-European

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2017 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
 

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