Noun

(uncountable) The process of developing; growth, directed change.

* {{quote-magazine, date=2013-07-19, author= Ian Sample

, volume=189, issue=6, page=34, magazine=(The Guardian Weekly) , title= Irregular bedtimes may affect children's brains , passage=Irregular bedtimes may disrupt healthy brain development in young children, according to a study of intelligence and sleeping habits.  ¶ Going to bed at a different time each night affected girls more than boys, but both fared worse on mental tasks than children who had a set bedtime, researchers found.}}

(uncountable, biology) The process by which a mature multicellular organism or part of an organism is produced by the addition of new cells.

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Of more significance in the nature of branch development ; in the Jubulaceae, as in the Porellaceae, branches are acroscopic and normally replace a ventral leaf lobe.

(countable) Something which has developed.

(real estate, countable) A project consisting of one or more commercial or residential buildings, real estate development.

(real estate, uncountable) The building of a real estate development.

(uncountable) The application of new ideas to practical problems (''cf. research).

(chess, uncountable) The active placement of the pieces, or the process of achieving it.

(music) The second section of a piece of music in sonata form.

Noun

(wikipedia engagement) (en noun)

(countable) an appointment, especially to speak or perform

The lecturer has three speaking engagements this week.

(uncountable) connection or attachment

Check the gears for full engagement before turning the handle.

(countable or uncountable) the period of time when marriage is planned or promised

We are enjoying a long engagement , but haven't yet set a date.

In any situation of conflict, an actual instance of active hostilities.

The engagement resulted in many casualties.

(fencing) the point at which the fencers are close enough to join blades, or to make an effective attack during an encounter.

After engagement it quickly became clear which of the fencers was going to prevail .