> as lemmas

1889 E. J. Wall Dict. Photogr. 38 Detail, the definition of each minute part or parts of the material of a picture, whether in the negative or print therefrom.

1928 Television 1 ii. 7/3 It is claimed that much better definition and detail are obtained.

1928 Television 1 ii. 10/1 A difference of phase of only one per cent. between the transmitter and the receiver is sufficient to spoil the definition of the received image.

1933 Television 6 lxix. 373/1 Other companies, too, may..be given similar opportunities of providing high-definition television apparatus for transmission experiments.

1935 Discovery Sept. 277/2 The pioneer work of Baird..with low and high definition scanning.

1935 Discovery Sept. 278/1 The iconoscope camera, which is said to be capable of definition up to 500 lines.

1937 Amateur Photography (Newnes) 50 This explains the superb definition of the tiny cine-film pictures, in spite of their enormous enlargement when projected.

1943 Gloss. Terms Telecomm. (B.S.I.) 77 High-definition television, a system of television in which the number of scanning-lines exceeds 200 for each picture.

1946 Nature 20 July 88/2 In 1929..the B.B.C. decided to give Messrs. Baird Television, Ltd., facilities for experimental transmissions through the medium-wave London station. These transmissions, which were afterwards referred to as ‘low-definition’, employed 30 scanning lines and 12½ pictures per second.

1955 J. Lipinski Miniature & Precision Cameras ii. 34 It is not generally realized how serious a contribution camera shake makes in degrading the definition of a photograph taken with a miniature.

1969 M. J. Langford Advanced Photogr. iii. 58 A high resolution lens may well form separate images of closely spaced lines, but unless the blacks and whites are also clearly definable by their contrast the impression of ‘definition’ will be poor.