door opener

door opener

noun
1.
a mechanism that automatically opens a door, as of a garage, when actuated by a radio transmitter, electric eye, or other device.
2.
Informal. something that is effective in leading to opportunity or success: Sales experience can be a door opener for young executives.
Also, door-o·pener.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Door opener is always a great word to know.
So is lollapalooza. Does it mean:
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
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