| apron | (noun) a garment of cloth or leather or plastic that is tied about the waist and worn to protect your clothing | - |
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| (noun) a paved surface where aircraft stand while not being used | - |
| (noun) the part of a modern theater stage between the curtain and the orchestra (i.e., in front of the curtain) | Synonyms: forestage, proscenium |
| (noun) (golf) the part of the fairway leading onto the green | - |
| apropos | (adjective) of an appropriate or pertinent nature | - |
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| (adverb) at an opportune time | Synonyms: seasonably, timely, well-timed |
| (adverb) introducing a different topic | Synonyms: by the bye, by the way, incidentally |