from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. One who casually drops in, as to visit or obtain an appointment.
  • n. An informal social event.
  • adj. Provided for short-term use: a drop-in center for runaways.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. provided for short-term use
  • adj. fit to substitute some element in a complex system without changes to the existing infrastructure
  • n. one who casually drops in.
  • n. informal social event


Sorry, no etymologies found.


  • Products like Virent's are known as "drop-in" fuels because they can be put into the nation's existing fueling infrastructure and even produced at existing refineries.

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  • In fact, Chameleon is being referred to as a drop-in replacement for UIKit, and in many cases, that's all that needs to be changed in order for an iOS app to run on the Mac.

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  • The year before she arrived, the school could have been described as a drop-in community center, with students doing as they pleased.

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  • Because weekly worship tends not to be a focus for Reform Jews, most Beth Emet members stay connected largely through an extensive menu of nonworship activities, such as the early childhood program, which includes a drop-in playgroup, a weekday nursery school, a Sunday school, and a summer camp.

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  • Domestically sourced, advanced drop-in biofuels that do not adversely impact food, water, or land use provide a significant opportunity for the department to reduce its dependence on foreign sources of fuel.

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  • Instead, she specified a drop-in compost canister for vegetable and fruit waste to be installed in the counter area near the sink.

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  • Their son Jonathan works at a drop-in centre offering "help, advice and a demonstration of God's love to shoppers".

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  • Back in the 1990's, when I was the director of a drop-in center for homeless teens in Times Square, and there were fewer shelter resources available, I knew seven homeless teens who were murdered on the streets of New York City; five of them were LGBT.

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  • Props to Neo/Mahmoud for running a drop-in centre for this lot.

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  • There were a few other activities noted for Friday evening, in addition to the retreat and her drop-in knitting session.

    A Stitch Before Dying


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