From Longman Dictionary of Contemporary Englishinstallin‧stall /ɪnˈstɔːl $ -ˈstɒːl/ ●●○ W3 verb [transitive] 1 TPUTto put a piece of equipment somewhere and connect it so that it is ready to be used They’ve installed the new computer network at last. Security cameras have been installed in the city centre.2 to add new software to a computer so that it is ready to be used opp uninstall We’ve installed new anti-virus software.3 BOPUT formal to put someone in an important job or position, especially with a ceremony Churchill was installed as Chancellor of the university.4 → install yourself in/at etcTHESAURUSinstall to put a piece of equipment somewhere and connect it so that it is ready to be usedThe company is installing a new computer system.How much does it cost to install central heating?put in to install something. Put in is more common in everyday English than install and is used especially about things that are not very complicated to installThe workmen are coming to put the new windows in today.They removed the bath and put in a shower instead.fit to put a new part or piece of equipment into or onto somethingI had to fit new locks after the burglary.All vehicles must have seat belts fitted.lay to put cables or a carpet in the correct place on the groundWork on laying the telephone cables has not yet begun.Two workmen were laying carpet tiles in the kitchen. → See Verb table
Examples from the Corpusinstall• The company is installing a new computer system.• Crime has dropped since the video cameras were installed in the town centre.• Lights were installed under the upper cabinets to illuminate the counter tops.