| Main Entry: | professional development |
| Part of Speech: | n |
| Definition: | the advancement of skills or expertise to succeed in a particular profession, esp. through continued education |
| Example: | They got a day off when the teachers had a professional development day. |
| Etymology: | 1857 |
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| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |