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1. To render active.
2. To make radioactive.


tr.v. acti·vated, acti·vating, acti·vates
1. To set in motion; make active or more active.
2. Biology To convert (certain biological compounds) into biologically active derivatives.

ac′ti·va′tion n.
ac′ti·va′tor n.


See activation.


(1) To render something active.
(2) To make something radioactive.
Chemistry To convert a compound—e.g., a provitamin or enzyme—into an active form or different compound, in particular one that has a specific biologic action
Example, activation by UV light Ergosterol, lumisterol, tachysterol, vitamin D2


1. To render active.
2. To make radioactive.

activate (ak´tivāt),

v in orthodontics, to adjust an appliance so that it will exert effective force on the teeth and jaws.

Patient discussion about activate

Q. Are there any nice activities for adults with autism? I've been helping a very nice man of 45 of years old and I'm looking for some new things I can do with him in our time together. any ideas?

A. Autistic people react wonderfully with animals. for instance- i saw a group of severe Autistic teenagers going to swim with dolphins. the effect was amazing! taking him to the zoo, or even to the park to feed ducks, pet dogs, whatever.. could have a great effect on him.
hope i helped!
tell me how it went.

Q. what is a passive smoking? and is it dangerous as an active?

A. Passive smoking is the exposure to cigarettes smoke emitted from cigarettes smoke by other person. It's dangerous and may increase the risk to several diseases similar to active smoking (one's exposure to smoke emitted from the cigarettes he or she is smoking) although the risk is of lower magnitude. Example for passive smoking is children of smokers etc.

You may read more here:

Q. i swim a lot ! what are the advantages of swimming over other sport activities? on what part of the body does it work the most ?

A. its a good workout but your not really going to burn as much calories as a regular work out.

More discussions about activate
References in periodicals archive ?
As MEHP diffuses into the cell, it also activates PPARs.
PPAR[gamma] is a key regulator of cell differentiation, and understanding that MEHP activates PPAR[gamma] provides further insight into the female reproductive toxicity of MEHP.
ACTIVATE Defy: With Support Against Free Radicals for Healthier Cells
According to Jesse Merrill, vice president of marketing, "Along with the reformulation, ACTIVATE has refreshed our packaging in order to better communicate the brand's unique positioning, cap function and enhanced formulas, while establishing a differentiated and ownable look.
ACTIVATE drinks contain 0 grams of sugar, 0 calories and are naturally sweetened with stevia, offering a delicious beverage option for people who want to GET ACTIVATED.
Through the partnership, fans will see Rivers and Freeman on the ACTIVATE website, social media pages including Facebook and Twitter, billboards, in-store signage, vehicle wraps and radio spots.
Whether I'm on the field training with my team, recovering from a tough game or re-charging after an intense workout, I rely on ACTIVATE to provide me with a dose of potent, fresh vitamins that keep me going," said Josh Freeman.
Emitting red light at a discrete frequency, intensity, and time period, the device activates LS11 in a prescribed "kill zone" around the LED array.
Litx[TM] uses light-emitting diodes (LEDs) to activate the proprietary photoreactive drug LS11 (talaporfin sodium).
The researchers further discovered that the viral protein activates immune cells by binding to cell surface proteins called integrins, which then trigger a signaling cascade within the cell.
The new process begins with much cheaper glass fibers, coats them with plastic resin, and then activates the resin carbon by heating it.